Update libxml2 to 2.13.5 #1678

Job	Run time
Run Coverity tests	0s
Build on Fedora 40	1m 7s
Run CodeQL tests	4m 43s
Build on Fedora 41	1m 5s
Build on macOS for macos	6m 22s
Deploy pages	0s
Build on macOS for iphoneos	3m 2s
Build on Fedora rawhide	1m 8s
Build on macOS for iphonesimulator	4m 4s
Build on Ubuntu 20.04	2m 44s
Build on macOS for androidarm	3m 11s
Build on Ubuntu 22.04	2m 29s
Build on macOS for androidarm64	3m 11s
Build on Windows (143, x86)	15m 27s
Build on Ubuntu 24.04	2m 43s
Build on macOS for androidx86_64	3m 12s
Build on Windows (143, x64)	14m 37s
Build on Ubuntu 24.10	2m 37s
Build on Windows (143, arm64)	13m 44s
Build on Windows (142, x86)	12m 49s
Build on Windows (142, x64)	12m 52s
Build on Windows (142, arm64)	12m 31s
	2h 3m 38s

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