ci(release): add write permission to release job

GitHub Actions requires explicit `contents: write` permission to create releases and upload assets since the default token permissions were tightened.

Author: nullmastermind

.github/workflows/build.yml

@@ -111,6 +111,8 @@ jobs:
     needs: [build]
 
     if: github.repository == 'nullmastermind/NotepadAI' && github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
+    permissions:
+      contents: write
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}