docs: fix grammar errors in user-facing reference documentation

[strawgate]

Summary

Fix grammar and spelling errors in docs/reference/** documentation files.

• Fix subject-verb disagreement: the dashboard are loaded → the dashboards are loaded (×5 beats)
• Fix spelling: piplines → pipelines in winlogbeat CLI docs
• Fix subject-verb disagreement: This settings allows → This setting allows (×2)
• Fix participle usage: on configuration the → on configuring the in syslog metrics endpoint docs (×6 beats)

These are pure documentation fixes with no source code changes.

Closes #49432

Test plan

• Verify each changed file shows the corrected text

[github-actions]

🤖 GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: b420b2c2-0b3e-426b-b2bf-4795c4228a87

📥 Commits

Reviewing files that changed from the base of the PR and between 884e58d and 71df918.

📒 Files selected for processing (15)

• changelog/fragments/1774377466-fix-typos-docs-ingest.yaml
• docs/reference/auditbeat/configuration-dashboards.md
• docs/reference/auditbeat/syslog.md
• docs/reference/filebeat/configuration-dashboards.md
• docs/reference/filebeat/filebeat-input-winlog.md
• docs/reference/filebeat/syslog.md
• docs/reference/heartbeat/syslog.md
• docs/reference/metricbeat/configuration-dashboards.md
• docs/reference/metricbeat/syslog.md
• docs/reference/packetbeat/configuration-dashboards.md
• docs/reference/packetbeat/syslog.md
• docs/reference/winlogbeat/command-line-options.md
• docs/reference/winlogbeat/configuration-dashboards.md
• docs/reference/winlogbeat/configuration-winlogbeat-options.md
• docs/reference/winlogbeat/syslog.md

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📝 Walkthrough

Walkthrough

This pull request corrects grammar and spelling errors across user-facing reference documentation. Changes include: fixing subject-verb disagreement in dashboard setup docs ("dashboard are" → "dashboards are"), correcting a spelling typo in CLI documentation ("piplines" → "pipelines"), fixing grammar in configuration option descriptions ("settings" → "setting"), and correcting phrasing in syslog metrics documentation ("configuration the" → "configuring the"). A changelog fragment documents these fixes across multiple beat modules. All modifications are documentation-only without altering configuration behavior or public code entities.

🚥 Pre-merge checks | ✅ 1 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	PR addresses 4 of 5 objective groups: corrects subject-verb disagreement in dashboards (5 files), pipelines typo, settings/setting grammar (2 files), and configuration/configuring phrasing (6 files). SQL module updates are missing.	Add corrections to x-pack/metricbeat/module/sql/_meta/docs.md and docs/reference/metricbeat/metricbeat-module-sql.md to complete all linked issue #49432 objectives.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Out of Scope Changes check	✅ Passed	All changes are documentation grammar/spelling fixes directly aligned with linked issue #49432. No unrelated or out-of-scope modifications detected.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

• 🛠️ Update Documentation: Commit on current branch
• 🛠️ Update Documentation: Create PR

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[vishaangelova]

This needs to be backported to 9.3 for the changes to be published to the docs site (we publish from the latest minor branch).