Update version number and xmlsec to 1.3.6 #1525

Job	Run time
Build on Fedora 39	1m 35s
Build on macOS for macos	1m 42s
Run Coverity tests	0s
Build on Fedora 40	1m 39s
Run CodeQL tests	3m 20s
Build on Fedora 41	1m 8s
Build on macOS for iphoneos	54s
Build on macOS for iphonesimulator	1m 12s
Deploy pages	0s
Build on Ubuntu 20.04	2m 46s
Build on macOS for androidarm	1m 0s
Build on Windows (143, x86)	7m 1s
Build on macOS for androidarm64	1m 1s
Build on Ubuntu 22.04	2m 35s
Build on Windows (143, x64)	6m 41s
Build on macOS for androidx86_64	1m 9s
Build on Ubuntu 24.04	2m 52s
Build on Ubuntu 24.10	2m 42s
	39m 17s

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