deps: update nghttp2 to 1.69.0, with fixes for some integration issues #5740

Job	Run time
Build slim tarball	2m 7s
x86_64-linux: with shared libraries	23m 49s
aarch64-linux: with shared libraries	21m 36s
x86_64-darwin: with shared libraries	41m 39s
aarch64-darwin: with shared libraries	23m 53s
	1h 53m 4s

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