Fix GitHub release action.

Release name should be blank, but this parameter is documented as
non-optional.

Forgot to set the executable flag on the release description script.

Author: HexDecimal

.github/workflows/release-on-tag.yml

@@ -22,7 +22,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
+          release_name: ''
           body_path: release_body.md
           draft: true
           prerelease: false