fix(ci): only block merge on freeze for stable branches

Signed-off-by: Max <[email protected]>

.github/workflows/block-merge-freeze.yml

@@ -20,7 +20,7 @@ jobs:
   block-merges-during-freeze:
     name: Block merges during freezes
 
-    if: github.event.pull_request.draft == false
+    if: github.event.pull_request.draft == false && startsWith(github.base_ref, 'stable')
 
     runs-on: ubuntu-latest-low