Fix test 2 that was missing: --enable-incomplete-feature=TypeForm

Author: davidfstr

test-data/unit/check-fastparse.test

@@ -326,6 +326,7 @@ def call() -> str: pass
 [builtins fixtures/module.pyi]
 
 [case testInvalidEscapeSequenceWarningsSuppressed]
+# flags: --python-version 3.14 --enable-incomplete-feature=TypeForm
 # Test that SyntaxWarnings for invalid escape sequences are suppressed
 # when parsing potential type expressions containing regex patterns or
 # similar strings. Callable arguments are always potential type expressions.