chore: update binding java artifact name in README #7574

Job	Run time
build-c-doc	30s
build-cpp-doc	32s
build-haskell-doc	10m 15s
build-java-doc	24s
build-nodejs-doc	25s
build-lua-doc	14s
build-python-doc	3m 4s
build-ocaml-doc	5m 0s
build-rust-doc	4m 31s
build-dav-server-opendalfs-doc	42s
build-fuse3-opendal-doc	41s
build-object-store-opendal-doc	40s
build-unftp-sbe-opendal-doc	1m 3s
build-parquet-opendal-doc	47s
build-virtiofs-opendal-doc	52s
build-website	3m 29s
	33m 9s

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