Running `make release` multiple times fails

When running make release multiple times, we get an error like:

mv: 'tor-browser-10.5.2-linux-x86_64-6b1936/tor-browser-linux64-10.5.2_zh-TW.tar.xz' and '/home/boklm/tor-browser-build-new/release/unsigned/10.5.2-build1/tor-browser-linux64-10.5.2_zh-TW.tar.xz' are the same file

This is probably due to 2bf6670f (#40296 (closed)).