[HOTFIX] Fix RAT exclusion for known_translations file

Author: Josh Rosen <[email protected]>

Closes #3719 from JoshRosen/rat-fix and squashes the following commits:

1542886 [Josh Rosen] [HOTFIX] Fix RAT exclusion for known_translations file

Author: JoshRosen

.rat-excludes

@@ -64,4 +64,4 @@ dist/*
 logs
 .*scalastyle-output.xml
 .*dependency-reduced-pom.xml
-dev/create-release/known_translations
+known_translations