fix error message on test_join_index to the updated change

Author: KevsterAmp

pandas/tests/frame/methods/test_join.py

@@ -1,4 +1,5 @@
 from datetime import datetime
+import re
 import zoneinfo
 
 import numpy as np
@@ -276,7 +277,11 @@ def test_join_index(float_frame):
     tm.assert_index_equal(joined.index, float_frame.index.sort_values())
     tm.assert_index_equal(joined.columns, expected_columns)
 
-    with pytest.raises(ValueError, match="join method"):
+    join_msg = (
+        "'foo' is not a valid Merge type "
+        "('left', 'right', 'inner', 'outer', 'cross', 'asof')"
+    )
+    with pytest.raises(ValueError, match=re.escape(join_msg)):
         f.join(f2, how="foo")
 
     # corner case - overlapping columns