chore: fix cargo clippy #8101

Job	Run time
build-nodejs-doc	20s
build-python-doc	3m 12s
build-rust-doc	3m 44s
build-c-doc	22s
build-cpp-doc	25s
build-dav-server-opendalfs-doc	50s
build-fuse3-opendal-doc	50s
build-haskell-doc	3m 25s
build-lua-doc	11s
build-object-store-opendal-doc	51s
build-ocaml-doc	4m 56s
build-parquet-opendal-doc	54s
build-unftp-sbe-opendal-doc	1m 13s
build-virtiofs-opendal-doc	40s
build-java-doc	12s
build-opendal-compat-doc	51s
build-website	1m 26s
	24m 22s

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