ci: fix the python build in publish - #61

Error: ENOENT: no such file or directory, stat '/home/runner/work/lance-graph/lance-graph/python/rust-toolchain.toml' at Object.statSync (node:fs:1667:25) at /home/runner/work/_actions/Swatinem/rust-cache/f13886b937689c021905a6b90929199931d60db1/dist/restore/index.js:149015:74 at Array.filter (<anonymous>) at globFiles (/home/runner/work/_actions/Swatinem/rust-cache/f13886b937689c021905a6b90929199931d60db1/dist/restore/index.js:149015:35) at async CacheConfig.new (/home/runner/work/_actions/Swatinem/rust-cache/f13886b937689c021905a6b90929199931d60db1/dist/restore/index.js:148823:31) at async run (/home/runner/work/_actions/Swatinem/rust-cache/f13886b937689c021905a6b90929199931d60db1/dist/restore/index.js:149348:24)