[Bugfix] Disable ci for .md files

[OrangeRedeng]

Motivation

Fix of #21409.

Modifications

CI will now ignore all .md files

Accuracy Tests

No influence

Benchmarking and Profiling

No influence

Checklist

• Format your code according to the Format code with pre-commit.
• Add unit tests according to the Run and add unit tests.
• Update documentation according to Write documentations.
• Provide accuracy and speed benchmark results according to Test the accuracy and Benchmark the speed.
• Follow the SGLang code style guidance.

Review Process

1. Ping Merge Oncalls to start the PR flow. See the PR Merge Process.
2. Get approvals from CODEOWNERS and other reviewers.
3. Trigger CI tests with comments or contact authorized users to do so.
   • /tag-run-ci-label, /rerun-failed-ci, /tag-and-rerun-ci
4. After green CI and required approvals, ask Merge Oncalls to merge.

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[ping1jing2]

/tag-and-rerun-ci

[Fridge003]

This commit will unexpectedly trigger every test

[hnyls2002]

@Kangyan-Zhou @ping1jing2 @OrangeRedeng Please change the rules similar to #21334

[ping1jing2]

@Kangyan-Zhou @ping1jing2 @OrangeRedeng Please change the rules similar to #21334

ok