chore: fix pr-title-checker (slsa-framework#770)

Updates `thehanimo/pr-title-checker` to v1.4.2 and fixes the version
comment.

Signed-off-by: Ian Lewis <[email protected]>
Signed-off-by: Ramon Petgrave <[email protected]>

Author: Ian Lewis

.github/workflows/pr-title.yml

@@ -10,7 +10,7 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-      - uses: thehanimo/pr-title-checker@e914bff8ab5e6f1a6a270da6954cd6bfd1d7f1fb  # v1
+      - uses: thehanimo/pr-title-checker@1d8cd483a2b73118406a187f54dca8a9415f1375 # v1.4.2
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           configuration_path: ".github/pr-title-checker-config.json"