Don't run build and test if only docs changed (#24530)

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

.github/workflows/pull-docker-dryrun-docsignore.yml

@@ -0,0 +1,13 @@
+name: docker-dryrun
+
+on:
+  pull_request:
+    paths:
+      - "docs/**"
+      - "*.md"
+
+jobs:
+  docker-dryrun:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "No build required"