[SemanticResultFormats] Add new message key to ignore

Extension is currently disabled on TWN, but adding in case...

https://gerrit.wikimedia.org/r/#/c/46650/8/SemanticResultFormats.i18n.php,unified

Change-Id: I482f04352d261bfca963e31cfbb152be723eb67e
Merge "[SemanticResultFormats] Add new message key to ignore"