Update couple more tests

Author: ilevkivskyi

test-data/unit/check-serialize.test

@@ -158,7 +158,7 @@ def f(__x: int) -> None: pass
 [out2]
 tmp/a.py:3: error: Argument 1 to "f" has incompatible type "str"; expected "int"
 tmp/a.py:4: error: Unexpected keyword argument "__x" for "f"
-tmp/b.py: note: "f" defined here
+tmp/b.py:1: note: "f" defined here
 
 [case testSerializeArgumentKindsErrors]
 import a
@@ -224,7 +224,7 @@ def f(x: int) -> int: pass
 [out2]
 tmp/a.py:2: note: Revealed type is "builtins.str"
 tmp/a.py:3: error: Unexpected keyword argument "x" for "f"
-tmp/b.py: note: "f" defined here
+tmp/b.py:4: note: "f" defined here
 
 [case testSerializeTypeGuardFunction]
 import a