Comment 7 for bug 1961427

The patch applies cleanly not only to the impish and jammy versions, but also to the focal version of zlib.

To be on the save side I did another test build for focal:
https://launchpad.net/~fheimes/+archive/ubuntu/lp1961427

And here is the focal debdiff attached (debdiff_zlib_1.2.11.dfsg-2ubuntu1.2_to_zlib_1.2.11.dfsg-2ubuntu1.3).