Merge contrib.yml into checks.yml

.github/workflows/checks.yml

@@ -19,6 +19,16 @@ jobs:
             echo "::set-output name=is_tagged::"
           fi
 
+  contrib:
+    name: Author in CONTRIBUTORS
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: Check
+        run: |
+          set -x
+          .github/scripts/contrib.sh
+
   tests:
     needs:
       - check_tag

.github/workflows/contrib.yml

@@ -1,12 +0,0 @@
-name: Author in CONTRIBUTORS
-
-on: [push, pull_request]
-
-jobs:
-  check:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v1
-      - name: Check
-        run: |
-          .github/scripts/contrib.sh