Fix link checker CI failure by excluding LinkedIn URLs

[dai-chen]

Description

Exclude LinkedIn URLs from the lychee link checker workflow. LinkedIn blocks automated crawlers and returns 404 for valid profile pages, causing false-positive CI failures.

Example:

## Errors per input

### Errors in docs/presentations/20201116-sql-demo.md

* [404] <https://www.linkedin.com/in/chen-dai/> (at 6:15) | Rejected status code: 404 Not Found

Notice: Summary report available at: https://github.com/opensearch-project/sql/actions/runs/26255105263#summary-77275788037
Error: Process completed with exit code 2.

Related Issues

N/A

Check List

• New functionality includes testing.
• New functionality has been documented.
• New functionality has javadoc added.
• New functionality has a user manual doc added.
• New PPL command checklist all confirmed.
• API changes companion pull request created.
• Commits are signed per the DCO using --signoff or -s.
• Public documentation issue/PR created.

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[github-actions]

PR Reviewer Guide 🔍

(Review updated until commit d6c3749)

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🧪 No relevant tests

🔒 No security concerns identified

✅ No TODO sections

🔀 No multiple PR themes

⚡ No major issues detected

[github-actions]

PR Code Suggestions ✨

Latest suggestions up to d6c3749
Explore these optional code suggestions:

Category	Suggestion	Impact
General	Broaden LinkedIn URL exclusion pattern The LinkedIn exclusion pattern https://www.linkedin.com/.* may not match all LinkedIn URL variations (e.g., http://, subdomains like in.linkedin.com). Consider using a more comprehensive pattern like .linkedin.com. to ensure all LinkedIn URLs are properly excluded. .github/workflows/link-checker.yml [21] -args: --accept=200,403,429,999 "./**/*.html" "./**/*.md" "./**/*.txt" --exclude "https://aws.oss.sonatype.*|https://ci.opensearch.*|https://central.sonatype.*|http://localhost.*|https://localhost|https://odfe-node1:9200/|https://community.tableau.com/docs/DOC-17978|.*family.zzz|opensearch*|.*@amazon.com|.*email.com|.*@github.com|http://timestamp.verisign.com/scripts/timstamp.dll|https://www.linkedin.com/.*" +args: --accept=200,403,429,999 "./**/*.html" "./**/*.md" "./**/*.txt" --exclude "https://aws.oss.sonatype.*|https://ci.opensearch.*|https://central.sonatype.*|http://localhost.*|https://localhost|https://odfe-node1:9200/|https://community.tableau.com/docs/DOC-17978|.*family.zzz|opensearch*|.*@amazon.com|.*email.com|.*@github.com|http://timestamp.verisign.com/scripts/timstamp.dll|.*linkedin\.com.*" Suggestion importance[1-10]: 7 __ Why: The suggestion correctly identifies that the current pattern https://www.linkedin.com/.* only matches HTTPS URLs with the www subdomain. Using .*linkedin\.com.* would catch all LinkedIn URL variations including HTTP, different subdomains, and paths, making the exclusion more robust and comprehensive.	Medium

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Previous suggestions

Suggestions up to commit f3c36b4

Category	Suggestion	Impact
General	Broaden LinkedIn URL exclusion pattern The LinkedIn exclusion pattern https://www.linkedin.com/.* may not match all LinkedIn URL variations (e.g., http://, subdomains like in.linkedin.com). Consider using a more comprehensive pattern like .linkedin.com. to catch all LinkedIn URLs regardless of protocol or subdomain. .github/workflows/link-checker.yml [21] -args: --accept=200,403,429,999 "./**/*.html" "./**/*.md" "./**/*.txt" --exclude "https://aws.oss.sonatype.*|https://ci.opensearch.*|https://central.sonatype.*|http://localhost.*|https://localhost|https://odfe-node1:9200/|https://community.tableau.com/docs/DOC-17978|.*family.zzz|opensearch*|.*@amazon.com|.*email.com|.*@github.com|http://timestamp.verisign.com/scripts/timstamp.dll|https://www.linkedin.com/.*" +args: --accept=200,403,429,999 "./**/*.html" "./**/*.md" "./**/*.txt" --exclude "https://aws.oss.sonatype.*|https://ci.opensearch.*|https://central.sonatype.*|http://localhost.*|https://localhost|https://odfe-node1:9200/|https://community.tableau.com/docs/DOC-17978|.*family.zzz|opensearch*|.*@amazon.com|.*email.com|.*@github.com|http://timestamp.verisign.com/scripts/timstamp.dll|.*linkedin\.com.*" Suggestion importance[1-10]: 7 __ Why: The suggestion correctly identifies that the current pattern https://www.linkedin.com/.* only matches HTTPS URLs with the www subdomain. The proposed pattern .*linkedin\.com.* is more comprehensive and will catch all LinkedIn URLs regardless of protocol or subdomain, making the exclusion more robust.	Medium

[github-actions]

Persistent review updated to latest commit d6c3749