Fix change index version of 3.9.0 to 84

The change index version was reverted back from 85 to 84 with
9339e8563c Revert "Bump Lucene version to 9.7.0".

See I98122ca165d5b7b2e2d40a45b35a52496abd8c80

Change-Id: I344bbc95cb6e93699625d52b59e5a2cec3e499e4
1 file changed