Wenchen Fan 783852cc2e [SPARK-31320] Fix release script for 3.0.0 ... ### What changes were proposed in this pull request? The release script stops working after d5865493ae , as we require `mkdocs 1.0.0`. This PR upgrades `mkdocs` from 0.1.6.3 to 1.0.4. To do that ruby is also upgraded to 2.5. This PR also fixes some small issues. ### Why are the changes needed? to make RC ### Does this PR introduce any user-facing change? no ### How was this patch tested? tested by 3.0.0-rc1 Closes #28088 from cloud-fan/rc. Authored-by: Wenchen Fan <wenchen@databricks.com> Signed-off-by: HyukjinKwon <gurwls223@apache.org>		2020-04-01 16:45:28 +09:00
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Dockerfile	[SPARK-31320] Fix release script for 3.0.0	2020-04-01 16:45:28 +09:00