Split RTD PR preview builds between Volto and plone/registry

.github/workflows/docs-rtd-pr-preview-registry.yml

@@ -0,0 +1,26 @@
+# .github/workflows/docs-rtd-pr-preview-registry.yml
+name: readthedocs/actions
+on:
+  pull_request_target:
+    types:
+      - opened
+    # Execute this action only on PRs that touch
+    # documentation files for @plone/registry.
+    branches:
+      - main
+    paths:
+      - .readthedocs.yaml
+      - requirements-docs.txt
+      - "packages/registry/docs/**"
+
+permissions:
+  pull-requests: write
+
+jobs:
+  documentation-links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: readthedocs/actions/preview@v1
+        with:
+          project-slug: "plone-registry"
+          single-version: "true"

.github/workflows/docs-rtd-pr-preview.yml → .github/workflows/docs-rtd-pr-preview-volto.yml

@@ -1,16 +1,17 @@
-# .github/workflows/docs-rtd-pr-preview.yml
+# .github/workflows/docs-rtd-pr-preview-volto.yml
 name: readthedocs/actions
 on:
   pull_request_target:
     types:
       - opened
     # Execute this action only on PRs that touch
-    # documentation files.
+    # documentation files for Volto.
+    branches:
+      - main
     paths:
       - "docs/source/**"
       - .readthedocs.yaml
       - requirements-docs.txt
-      - "packages/registry/docs/**"
 
 permissions:
   pull-requests: write