Split bundle audit into separate workflow

Author: fbacall

.github/workflows/audit.yml

@@ -0,0 +1,20 @@
+name: Gem audit
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install imagemagick
+      - name: Check out code
+        uses: actions/checkout@v6
+      - name: Install Ruby & gems
+        uses: ruby/setup-ruby@v1
+        with:
+          bundler-cache: true
+      - name: Audit gems
+        run: bundle exec bundle-audit check --update

.github/workflows/test.yml

@@ -64,5 +64,3 @@ jobs:
         run: bundle exec rails test
       - name: Run system tests
         run: bundle exec rails test:system
-      - name: Audit gems
-        run: bundle exec bundle-audit check --update