chore(deps): bump Namchee/conventional-pr from 0.15.3 to 0.15.4 (#254)

Bumps [Namchee/conventional-pr](https://github.com/namchee/conventional-pr) from 0.15.3 to 0.15.4.
- [Release notes](https://github.com/namchee/conventional-pr/releases)
- [Commits](Namchee/conventional-pr@8378fb2...b31518c)

---
updated-dependencies:
- dependency-name: Namchee/conventional-pr
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/validate-pr.yml

@@ -11,7 +11,7 @@ jobs:
   conventional-commit:
     runs-on: ubuntu-latest
     steps:
-      - uses: Namchee/conventional-pr@8378fb29fcf8e0b18ce4f366ffd70483e5e9e8d8 # v0.15.3
+      - uses: Namchee/conventional-pr@b31518c34a4243c21484e3187abbbee4a44d0ec4 # v0.15.4
         with:
           access_token: ${{ secrets.GITHUB_TOKEN }}
           body: false