Update ref description in action.ymls to include expected format for uploads

[felickz]

Users confused by error main does not match /^refs\/(heads|pull|tags)\/.*$/. - sync up with REST docs

    - name: Perform CodeQL Analysis
      uses: github/codeql-action/analyze@v3
      with:
        category: "/language:${{matrix.language}}"
        ref: some ref
        sha: some sha

[Copilot]

Pull Request Overview

Updates the ref input descriptions in both analyze/action.yml and upload-sarif/action.yml to include the expected format specifications for Git references.

• Adds format specification for the ref input parameter in both action files
• Provides clear examples of valid ref formats (heads, tags, pull request merge/head references)

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
upload-sarif/action.yml	Adds expected format examples to the ref input description
analyze/action.yml	Adds expected format examples to the ref input description

[henrymercer]

Thanks!