Relax PR title parser to accept spaced colon in semantic titles

[Copilot]

The PR Title Checker workflow failed on valid intent titles like feat : ... because the default semantic parser requires no space before :. This change updates PR title parsing to tolerate spacing around the separator while still enforcing a valid Conventional Commit type.

• Workflow parsing update

  • Added explicit headerPattern/headerPatternCorrespondence in .github/workflows/pr-title-checker.yml.
  • Pattern now accepts both feat: subject and feat : subject.

• Validation rule preserved

  • Commit type remains required (\w+), so invalid forms like : subject or (scope): subject are still rejected.

- uses: amannn/action-semantic-pull-request@v6
  with:
    headerPattern: '^(\w+)(?:\(([\w$.\-*/ ]*)\))?\s*:\s*(.*)$'
    headerPatternCorrespondence: type, scope, subject