Backport of docs: Consul K8s 0.48.0 release notes into release/1.13.x

[hc-github-team-consul-core]

Backport

This PR is auto-generated from #14414 to be assessed for backporting due to the inclusion of the label type/docs-cherrypick.

The below text is copied from the body of the original PR.

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Description

• Consul K8s 0.48.0 release notes. To be merged upon release.
• Added small formatting changes on other pages.

Testing & Reproduction steps

• In the case of bugs, describe how to replicate
• If any manual tests were done, document the steps and the conditions to replicate
• Call out any important/ relevant unit tests, e2e tests or integration tests you have added or are adding

Links

Include any links here that might be helpful for people reviewing your PR (Tickets, GH issues, API docs, external benchmarks, tools docs, etc). If there are none, feel free to delete this section.

Please be mindful not to leak any customer or confidential information. HashiCorp employees may want to use our internal URL shortener to obfuscate links.

PR Checklist

• updated test coverage
• external facing docs updated
• not a security concern

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Overview of commits

• 2b7f832 - 3f5a7a5 - a3d7727 - cf3a379 - e515b42 - 4234837 - 9f296d8 - 534fac8 - 7c345ea - e34c7e2 - 4e56bd2 - d876aee - 9ed2bbe - 469421d