Bump Elastic.Clients.Elasticsearch from 9.1.5 to 9.1.9

[dependabot]

Updated Elastic.Clients.Elasticsearch from 9.1.5 to 9.1.9.

Release notes

Sourced from Elastic.Clients.Elasticsearch's releases.

9.1.9

What's Changed

• Switch to custom SafeSkip() method that works with partial JSON blocks by @​flobernd in Switch to custom SafeSkip() method that works with partial JSON blocks elastic/elasticsearch-net#8720
  • Improves compatibility in certain streaming scenarios

Full Changelog: elastic/elasticsearch-net@9.1.8...9.1.9

9.1.8

What's Changed

• Regenerate client by @​flobernd in [9.1] Regenerate client elastic/elasticsearch-net#8707
• Regenerate client by @​flobernd in [9.1] Regenerate client elastic/elasticsearch-net#8711
  • Improves usability of CompositeAggregation (see #​8704)

Breaking Changes

The type of the Sources property has been changed from ICollection<IDictionary<string, CompositeAggregationSource>> to ICollection<KeyValuePair<string, CompositeAggregationSource>>. This corresponds to the Elasticsearch standard for modeling ordered dictionaries in the REST API.

CompositeAggregationSource is now also a container (similar to Aggregation, Query, etc.). This change improves usability due to specialized code generation. For example, implicit conversion operators from all existing variants (CompositeTermsAggregation, CompositeHistogramAggregation, etc.) to CompositeAggregationSource are now generated.

As a consequence, the object initializer syntax changes as follows:

// 9.1.7 and below

var request = new SearchRequest
{
    Aggregations = new Dictionary<string, Aggregation>
    {
        { "my_composite", new CompositeAggregation
        {
            Sources =
            [
                new Dictionary<string, CompositeAggregationSource>
                {
                    { "my_terms", new CompositeAggregationSource
                    {
                        Terms = new CompositeTermsAggregation
                        {
                            // ...
                        }
                    }}
                },
                new Dictionary<string, CompositeAggregationSource>
                {
                    { "my_histo", new CompositeAggregationSource
                    {
                        Histogram = new CompositeHistogramAggregation(0.5)
                        {
                            // ...
                        }
                    }}
                }
            ]
        }}
    }
};

 ... (truncated)

## 9.1.7

## What's Changed

* BulkResponseItemConverter: Continue after skipping unmapped json member by @​MindaugasButkus in https://github.com/elastic/elasticsearch-net/pull/8698

## New Contributors

* @​MindaugasButkus made their first contribution in https://github.com/elastic/elasticsearch-net/pull/8698

**Full Changelog**: https://github.com/elastic/elasticsearch-net/compare/9.1.6...9.1.7

## 9.1.6

## What's Changed

* Fix deserialization of `Context` by @​flobernd in https://github.com/elastic/elasticsearch-net/pull/8688

**Full Changelog**: https://github.com/elastic/elasticsearch-net/compare/9.1.5...9.1.6

Commits viewable in [compare view](https://github.com/elastic/elasticsearch-net/compare/9.1.5...9.1.9).
</details>

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=Elastic.Clients.Elasticsearch&package-manager=nuget&previous-version=9.1.5&new-version=9.1.9)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)


</details>