ci: disable PR title check for dependabot PRs (#312)

* Initial plan

* ci: disable PR title check for dependabot PRs

Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: Mossaka <5447827+Mossaka@users.noreply.github.com>

Author: Copilot

.github/workflows/pr-title.yml

@@ -13,6 +13,9 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
+          # Skip validation for dependabot PRs (they use their own title format)
+          ignoreLabels: |
+            dependencies
           # Configure which types are allowed
           types: |
             feat