update error message

fixes a small typo in the `INVOCATION_OF_NON_FUNCTION_EXPRESSION` message

Closes #35589
#35589

GitOrigin-RevId: b30d584
Change-Id: I623ebd0f5113e4bc8b1e07bfd963c27a28c7fef0
Reviewed-on: https://dart-review.googlesource.com/c/88603
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>

pkg/analyzer/lib/src/error/codes.dart

@@ -3016,7 +3016,7 @@ class StaticTypeWarningCode extends ErrorCode {
    */
   static const StaticTypeWarningCode INVOCATION_OF_NON_FUNCTION_EXPRESSION =
       const StaticTypeWarningCode('INVOCATION_OF_NON_FUNCTION_EXPRESSION',
-          "The expression doesn't evaluate to a function, so it can't invoked.");
+          "The expression doesn't evaluate to a function, so it can't be invoked.");
 
   /**
    * 12.20 Conditional: It is a static type warning if the type of