Update libxml2 to 2.13.5 #1684

Job	Run time
Run Coverity tests	0s
Build on Fedora 40	1m 15s
Build on Ubuntu for androidarm	4m 36s
Build on Fedora 41	1m 4s
Run CodeQL tests	2m 56s
Build on Ubuntu for androidarm64	4m 40s
Build on macOS for macos	6m 3s
Build on Fedora rawhide	1m 1s
Build on Ubuntu for androidx86_64	4m 41s
Build on macOS for iphoneos	2m 27s
Deploy pages	0s
Build on macOS for iphonesimulator	3m 38s
Build on Ubuntu 20.04	2m 33s
Build on Windows (143, x86)	13m 7s
Build on Ubuntu 22.04	2m 25s
Build on Windows (143, x64)	14m 10s
Build on Windows (143, arm64)	12m 58s
Build on Ubuntu 24.04	2m 37s
Build on Ubuntu 24.10	2m 59s
Build on Windows (142, x86)	13m 51s
Build on Windows (142, x64)	13m 27s
Build on Windows (142, arm64)	12m 6s
	2h 2m 34s

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