build(deps): bump Namchee/conventional-pr from 0.14.1 to 0.15.3

Bumps [Namchee/conventional-pr](https://github.com/namchee/conventional-pr) from 0.14.1 to 0.15.3.
- [Release notes](https://github.com/namchee/conventional-pr/releases)
- [Commits](Namchee/conventional-pr@v0.14.1...v0.15.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/conv-pull-requests.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: conventional-pr
-        uses: Namchee/conventional-pr@v0.14.1
+        uses: Namchee/conventional-pr@v0.15.3
         with:
           access_token: ${{ secrets.GITHUB_TOKEN }}
           ignored_users: snyk-bot