fix(ci): grant contents:write to Release job

The default GITHUB_TOKEN lacks contents:write, causing the
softprops/action-gh-release step to 403. Add explicit permission
to the Release job.

Author: Interested-Deving-1896

.github/workflows/build.yml

@@ -144,6 +144,8 @@ jobs:
     runs-on: ubuntu-latest
     needs: build-matrix
     if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v4
       - name: Download all artifacts