docs(core): Add upgrade to v0.51 (#5406) #2147

Job	Run time
build_all_features	4m 48s
build_default_features (ubuntu-latest)	33s
build_under_wasm	47s
build_default_features (macos-latest)	37s
build_all_platforms (ubuntu-latest)	2m 31s
check_clippy	4m 46s
build_default_features (windows-latest)	2m 8s
build_all_platforms (macos-latest)	2m 26s
check_docs	3m 46s
build_all_platforms (windows-latest)	6m 0s
check_msrv	41s
unit	7m 15s
	36m 18s

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