simple typo fix

Closes #60485

GitOrigin-RevId: efef9e6
Change-Id: I062510b397e368da9de195b50e332b25f52196c1
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/420620
Reviewed-by: Kevin Moore <[email protected]>
Commit-Queue: Kevin Moore <[email protected]>

Author: timmaffett

pkg/compiler/test/codegen/data/is_test_weakening_with_bounds.dart

@@ -3,7 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // `is` tests against some parameterized interface types are equivalent to a
-// weaker test for just the interace. The weaker test is usually more efficient,
+// weaker test for just the interface. The weaker test is usually more efficient,
 // sometimes being compiled to `instanceof`.
 
 class Base<T extends num> {