Fix macOS build: include unistd.h in zlib's gzguts.h for lseek declaration#2

3dJan with Copilot wants to merge 2 commits into

3djan/FixResourceOrder3dJan/lib3mf:3djan/FixResourceOrderfrom

copilot/fix-macos-build-lseek-issue3dJan/lib3mf:copilot/fix-macos-build-lseek-issueCopy head branch name to clipboard