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FIx typo in `mz_zip_file.md` #552

Job	Run time
Ubuntu 20 GCC	46s
Ubuntu GCC ASAN	2m 19s
Ubuntu GCC UBSAN	2m 2s
Ubuntu GCC MSAN	59s
Ubuntu 20 Clang	45s
Ubuntu 20 Clang 6.0	57s
Ubuntu GCC	1m 2s
Ubuntu GCC OSB	49s
Ubuntu Clang	59s
Ubuntu Clang No Zlib	1m 0s
Ubuntu Clang No Bzip2	59s
Ubuntu Clang No LZMA	59s
Ubuntu Clang No Zstd	58s
Ubuntu Clang No Pkcrypt	1m 6s
Ubuntu Clang No Winzip AES	57s
Ubuntu Clang No Encryption	1m 1s
Ubuntu Clang Compress Only	55s
Ubuntu Clang Decompress Only	55s
Ubuntu Clang OpenSSL	1m 1s
Windows MSVC	2m 40s
Windows GCC Code Coverage	6m 14s
macOS Xcode	43s
macOS Xcode Code Coverage	1m 10s
macOS Xcode LibCompression	1m 4s
macOS Xcode OpenSSL	1m 9s
	33m 29s

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