Update GitHub action branch triggers.

See #3456

.github/workflows/ci.yml

@@ -1,9 +1,9 @@
-name: CI Build
+name: CI 4.0.x
 
 on:
   workflow_dispatch:
   push:
-    branches: [ main, 4.0.x, 3.5.x, 'issue/**' ]
+    branches: [ 4.0.x, 'issue/4.0.x/**' ]
 
 permissions: read-all
 

.github/workflows/snapshots.yml

@@ -3,7 +3,7 @@ name: Snapshots
 on:
   workflow_dispatch:
   push:
-    branches: [ main, 4.0.x, 3.5.x, 'issue/**' ]
+    branches: [ 4.0.x, 'issue/4.0.x/**' ]
 
 permissions: read-all