zstd: Update to version 1.5.5

zstd: Update to version 1.5.5

- Update from version 1.5.4 to 1.5.5
- Update of rootfile
- Changelog
    v1.5.5 (Apr 2023)
	fix: fix rare corruption bug affecting the high compression mode, reported by @danlark1 (#3517, @terrelln)
	perf: improve mid-level compression speed (#3529, #3533, #3543, @yoniko and #3552, @terrelln)
	lib: deprecated bufferless block-level API (#3534) by @terrelln
	cli: mmap large dictionaries to save memory, by @daniellerozenblit
	cli: improve speed of --patch-from mode (~+50%) (#3545) by @daniellerozenblit
	cli: improve i/o speed (~+10%) when processing lots of small files (#3479) by @felixhandte
	cli: zstd no longer crashes when requested to write into write-protected directory (#3541) by @felixhandte
	cli: fix decompression into block device using -o, reported by @georgmu (#3583)
	build: fix zstd CLI compiled with lzma support but not zlib support (#3494) by @Hello71
	build: fix cmake does no longer require 3.18 as minimum version (#3510) by @kou
	build: fix MSVC+ClangCL linking issue (#3569) by @tru
	build: fix zstd-dll, version of zstd CLI that links to the dynamic library (#3496) by @yoniko
	build: fix MSVC warnings (#3495) by @embg
	doc: updated zstd specification to clarify corner cases, by @Cyan4973
	doc: document how to create fat binaries for macos (#3568) by @rickmark
	misc: improve seekable format ingestion speed (~+100%) for very small chunk sizes (#3544) by @Cyan4973
	misc: tests/fullbench can benchmark multiple files (#3516) by @dloidolt

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>