Fix typo in comment

Co-authored-by: Koen Vlaswinkel <koesie10@users.noreply.github.com>

Author: aeisenberg

extensions/ql-vscode/src/databases/local-databases/database-events.ts

@@ -18,6 +18,6 @@ export interface DatabaseChangedEvent {
   item: DatabaseItem | undefined;
   // If true, event handlers should consider the database manager
   // to have been fully refreshed. Any state managed by the
-  // event handler shouuld be fully refreshed as well.
+  // event handler should be fully refreshed as well.
   fullRefresh: boolean;
 }