Describe the bug
Using a "cross" join makes mypy throw a warning.

To Reproduce
Create a file example.py with following contents:

import pandas as pd

df1 = pd.DataFrame({"A":[1,2], "B": ["test", "test"]})
df2 = pd.DataFrame({"C":[2, 3], "D": ["test", "test"]})
df3 = df1.join(df2,how="cross")
print(df3)

Run mypy on it: "mypy example.py "

Output:
example.py:5: error: Argument "how" to "join" of "DataFrame" has incompatible type "Literal['cross']"; expected "Literal['left', 'right', 'outer', 'inner']" [arg-type]
Found 1 error in 1 file (checked 1 source file)

Expected output:
output with 0 errors

Please complete the following information:

• OS: MacOs
• OS Version: Sonoma 14.6
• python version: 3.11.10
• version of type checker: mypy 1.11.2
• version of installed pandas-stubs: 2.2.2.240603

Additional context
Add any other context about the problem here.