Make a Github action workflow to enforce a semver PR label is present

.github/workflows/main.yml

@@ -9,7 +9,19 @@ on:
     types: [opened, synchronize, reopened, labeled, unlabeled]
 
 jobs:
+  check_for_semver_pr_label:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check that a semver label is present on the PR
+        if: github.event_name == 'pull_request'
+        uses: docker://agilepathway/pull-request-label-checker:latest
+        with:
+          one_of: major,minor,patch,trivial
+          repo_token: ${{ secrets.GITHUB_TOKEN }}
+
   build:
+    needs: [ check_for_semver_pr_label ]
     continue-on-error: true
 
     strategy:
@@ -44,13 +56,6 @@ jobs:
       - name: Run rake
         run: bundle exec rake
 
-      - name: Check for a semver PR label
-        if: github.event_name == 'pull_request'
-        uses: docker://agilepathway/pull-request-label-checker:latest
-        with:
-          one_of: major,minor,patch,trivial
-          repo_token: ${{ secrets.GITHUB_TOKEN }}
-
   coverage:
     needs: [ build ]
     runs-on: ubuntu-latest