Run CI on v* branches

Both the push and pull_request filters were limited to master, so commits
pushed to a version branch such as v7 ran no CI. Using [master, 'v*'] covers
future majors without a further edit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: tanem

.github/workflows/ci.yml

@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [master]
+    branches: [master, 'v*']
   pull_request:
-    branches: [master]
+    branches: [master, 'v*']
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}