explicit permissions

Author: anthony-nhs

.github/workflows/pull_request.yml

@@ -31,8 +31,9 @@ jobs:
     secrets:
       SONAR_TOKEN: '${{ secrets.SONAR_TOKEN }}'
   pr_title_format_check:
-    uses: >-
-      NHSDigital/eps-common-workflows/.github/workflows/pr_title_check.yml@f2d4d6942115472d3f08316cd25f400b02a9dc69
+    uses: NHSDigital/eps-common-workflows/.github/workflows/pr_title_check.yml@f2d4d6942115472d3f08316cd25f400b02a9dc69
+    permissions:
+      pull-requests: write
   get_issue_number:
     runs-on: ubuntu-22.04
     needs: quality_checks