The DataTableTool binary links against libz.so.1 but the ubuntu-latest
runner (Ubuntu 24.04) does not ship zlib1g by default. This causes every
tab-file PR to fail immediately with:
DataTableTool: error while loading shared libraries: libz.so.1:
cannot open shared object file: No such file or directory
Adding an explicit apt-get install step before the chmod ensures the
shared library is present before ant invokes the tool.
nick