test: fix zlib version regex
Add support for subrevision in the regular expression for the zlib version.
Refs: https://github.com/madler/zlib/blob/48c3741002ac/zlib.h#L40
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Add support for subrevision in the regular expression for the zlib version.
Refs: https://github.com/madler/zlib/blob/48c3741002ac/zlib.h#L40