Docs

docs(core): Add upgrade to v0.51 #8160

Job	Run time
build-c-doc	19s
build-cpp-doc	37s
build-dav-server-opendalfs-doc	43s
build-fuse3-opendal-doc	42s
build-haskell-doc	10m 47s
build-java-doc	24s
build-lua-doc	11s
build-nodejs-doc	24s
build-object-store-opendal-doc	38s
build-ocaml-doc	4m 31s
build-opendal-compat-doc	46s
build-parquet-opendal-doc	51s
build-python-doc	4m 13s
build-rust-doc	3m 41s
build-virtiofs-opendal-doc	48s
build-unftp-sbe-opendal-doc	1m 8s
build-website	1m 25s
	32m 8s

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