GitHub user GJL opened a pull request:
https://github.com/apache/flink/pull/4995
[hotfix] [docs] Fix broken link to FLINK-7811
This fixes a broken hyperlink on page
https://ci.apache.org/projects/flink/flink-docs-release-1.4/start/building.html#scala-versions

You can merge this pull request into a Git repository by running:
$ git pull https://github.com/GJL/flink hotfix-building-fix-url
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/4995.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4995
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