docs: fix 'ElasticSearch' casing and 'a SSL' -> 'an SSL' across reference docs

[MukundaKatta]

Fixes #50195.

Picks up the unambiguous items from the audit:

1. Product-name casing (2 files): ElasticSearch → Elasticsearch in the community-beats pages. Canonical name per Elastic style.

2. Article grammar (12 lines across 6 beats): not a SSL problem → not an SSL problem in the ssl-client-fails.md page for auditbeat / filebeat / heartbeat / metricbeat / packetbeat / winlogbeat. Same 2-line change in each beat (lines 61 + 66).

Docs-only; no schema or code changes.

[github-actions]

🤖 GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)
• /test : Run the Buildkite pipeline.

[mergify]

This pull request does not have a backport label.
If this is a bug or security fix, could you label this PR @MukundaKatta? 🙏.
For such, you'll need to label your PR with:

• The upcoming major version of the Elastic Stack
• The upcoming minor version of the Elastic Stack (if you're not pushing a breaking change)

To fixup this pull request, you need to add the backport labels for the needed
branches, such as:

• backport-8./d is the label to automatically backport to the 8./d branch. /d is the digit
• backport-active-all is the label that automatically backports to all active branches.
• backport-active-8 is the label that automatically backports to all active minor branches for the 8 major.
• backport-active-9 is the label that automatically backports to all active minor branches for the 9 major.

[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 Plus

Run ID: dfba06d0-834e-4dad-9521-0228fc18de7f

📥 Commits

Reviewing files that changed from the base of the PR and between f2ca1ee and 897cb1a.

📒 Files selected for processing (8)

• docs/extend/community-beats.md
• docs/reference/auditbeat/ssl-client-fails.md
• docs/reference/filebeat/ssl-client-fails.md
• docs/reference/heartbeat/ssl-client-fails.md
• docs/reference/libbeat/community-beats.md
• docs/reference/metricbeat/ssl-client-fails.md
• docs/reference/packetbeat/ssl-client-fails.md
• docs/reference/winlogbeat/ssl-client-fails.md

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📝 Walkthrough

Walkthrough

This pull request updates documentation across eight files with minor text corrections. Two files (docs/extend/community-beats.md and docs/reference/libbeat/community-beats.md) correct the product name from "ElasticSearch" to "Elasticsearch". Six SSL documentation files (docs/reference/auditbeat/ssl-client-fails.md, docs/reference/filebeat/ssl-client-fails.md, docs/reference/heartbeat/ssl-client-fails.md, docs/reference/metricbeat/ssl-client-fails.md, docs/reference/packetbeat/ssl-client-fails.md, and docs/reference/winlogbeat/ssl-client-fails.md) update the grammatical article from "a SSL" to "an SSL" in their explanatory sections. No functional changes or structural modifications are introduced.

🚥 Pre-merge checks | ✅ 1 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Linked Issues check	❓ Inconclusive	PR implements two of four requested text fix categories: ElasticSearch→Elasticsearch (2 files) and a SSL→an SSL (6 files). Omits node_stats a Elasticsearch and overcommitted spelling fixes.	Clarify scope: confirm whether partial implementation of issue #50195 is intentional or if remaining fixes (node_stats, overcommitted) should be included in this PR or separate issues.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Out of Scope Changes check	✅ Passed	All changes align with issue #50195 scope: product-name casing and SSL article grammar fixes only. No unrelated modifications detected.

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✨ Finishing Touches

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• Create PR with unit tests

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

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