fix: add contents:write permission for build-macos release creation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: createpjf

.github/workflows/build.yml

@@ -18,6 +18,8 @@ jobs:
   build-macos:
     needs: [ci]
     runs-on: macos-14
+    permissions:
+      contents: write
     strategy:
       matrix:
         target: [aarch64-apple-darwin, x86_64-apple-darwin]