Merge pull request #392 from alphagov/ENG-518-update-automatic-tag-in…

…crement

Update tag parsing to correctly extract release number

.github/workflows/post-merge-tests-and-tag.yml

@@ -25,7 +25,7 @@ jobs:
 
       - name: Tag release
         run: |
-          LATEST_RELEASE_NUMBER=$(git describe --abbrev=0 --tags --match "pre_release_*" | awk -F- '{print $2}' || echo "0")
+          LATEST_RELEASE_NUMBER=$(git describe --abbrev=0 --tags --match "pre_release_*" | awk -F'_' '{print $3}' || echo "0")
           NEW_RELEASE_NUMBER=$((LATEST_RELEASE_NUMBER + 1))
           TAG_NAME=pre_release_${NEW_RELEASE_NUMBER}
           echo "TAG_NAME: ${TAG_NAME}"