Fix test_annotation_access test case. (#374)

Co-authored-by: Germán Méndez Bravo <[email protected]>

libcst/metadata/tests/test_scope_provider.py

@@ -1017,7 +1017,7 @@ def test_annotation_access(self) -> None:
                 from a import A, B, C, D, E, F
                 def x(a: A):
                     pass
-                def y(b: B):
+                def y(b: "B"):
                     pass
                 def z(c: Literal["C"]):
                     pass