ci: add write permissions for GitHub releases

- Add contents:write permission to allow release creation
- Fixes 403 error when creating releases

.github/workflows/build.yml

@@ -9,6 +9,10 @@ on:
     branches: [ main ]
   workflow_dispatch:
 
+permissions:
+  contents: write
+  packages: write
+
 jobs:
   build-windows:
     runs-on: windows-latest