Restore: .gitignore changes for e626725

git-svn-id: https://develop.svn.wordpress.org/branches/fixes-64393-restore-version-history@62120 602fd350-edb4-49c9-b593-d223f7449a82

Author: dmsnell

.gitignore

@@ -41,6 +41,7 @@ wp-tests-config.php
 /src/wp-includes/blocks/**/*.js
 /src/wp-includes/blocks/**/*.js.map
 /packagehash.txt
+/.gutenberg-hash
 /artifacts
 /setup.log
 /coverage