fix: Clean release tarball from internals

Author: tomasz-blasz

.github/scripts/mk-release-package.sh

@@ -47,6 +47,7 @@ else
   git ls-files $sub_path | git checkout-index --stdin -qf --prefix="$dist_path.tmp/"
   mv -T "$dist_path.tmp/$sub_path/" "$dist_path/"
 fi
+rm -rf $dist_path/.github
 echo "$version" >$dist_path/.version
 tar -czf "build/$dist_name.tar.gz" -C "build" "$dist_name"