Fix branch filter pattens for provider branches in ci workflow

I **hope** this time it will be ok:

https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#filter-pattern-cheat-sheet

.github/workflows/ci.yml

@@ -21,9 +21,9 @@ on:  # yamllint disable-line rule:truthy
   schedule:
     - cron: '28 1,7,13,19 * * *'
   push:
-    branches: ['v[0-9]+-[0-9]+-test', 'providers-*/v[0-9]+-[0-9]+]']
+    branches: ['v[0-9]+-[0-9]+-test', 'providers-[a-z]+-?[a-z]*/v[0-9]+-[0-9]+']
   pull_request:
-    branches: ['main', 'v[0-9]+-[0-9]+-test', 'v[0-9]+-[0-9]+-stable', 'providers-*/v[0-9]+-[0-9]+']
+    branches: ['main', 'v[0-9]+-[0-9]+-test', 'v[0-9]+-[0-9]+-stable', 'providers-[a-z]+-?[a-z]*/v[0-9]+-[0-9]+']
   workflow_dispatch:
 permissions:
   # All other permissions are set to none