Update GitHub Actions release workflow and remove Windows build script

- Add write permissions to release workflow
- Remove deprecated build-win.sh script for Windows builds

Author: tsjnsn

.github/workflows/release.yml

@@ -5,6 +5,9 @@ on:
     tags:
       - 'v*'
 
+permissions:
+  contents: write
+
 jobs:
   create-release:
     runs-on: ubuntu-latest