Update comment.

Author: DanielRosenwasser

src/server/protocol.ts

@@ -3008,7 +3008,7 @@ namespace ts.server.protocol {
          */
         readonly includeCompletionsWithInsertText?: boolean;
         /**
-         * Unless this option is disabled, or `includeCompletionsWithInsertText` is not enabled,
+         * Unless this option is `false`, or `includeCompletionsWithInsertText` is not enabled,
          * member completion lists triggered with `.` will include entries on potentially-null and potentially-undefined
          * values, with insertion text to replace preceding `.` tokens with `?.`.
          */