Fix mypy error

Author: WyattBlue

tests/test_audioframe.py

@@ -115,7 +115,7 @@ def test_from_ndarray_value_error() -> None:
         AudioFrame.from_ndarray(array, format="flt", layout="mono")
 
     # incorrect number of dimensions
-    array = np.zeros(shape=(1, 160, 2), dtype="f4")
+    array2 = np.zeros(shape=(1, 160, 2), dtype="f4")
     with pytest.raises(
         ValueError, match="Expected numpy array with ndim `2` but got `3`"
     ) as cm: