fix: token environment variable in release action

Author: cmars

.github/workflows/release.yml

@@ -42,5 +42,5 @@ jobs:
     - name: Release
       run: cargo release --execute --no-confirm $(convco version --bump)
     env:
-      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}