Do not run check for patches on main, just release candidates

Author: timsaucer

.github/workflows/build.yml

@@ -99,7 +99,7 @@ jobs:
         run: taplo format --check
 
   check-crates-patch:
-    if: inputs.build_mode == 'release'
+    if: inputs.build_mode == 'release' && startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6