docs: Inconsistent Type Hint for data Parameter in post() Method of Playwright Python API

[Giridharagopal]

The post() method in the Playwright Python API documentation specifies the type for the data parameter as str | bytes | None. However, in practice, the data parameter is often passed as a dict, especially when sending JSON payloads.
def post(self,
url: str,
*,
params: dict[str, str | float | bool] | str | None = None,
headers: dict[str, str] | None = None,
data: str | bytes | None = None)

Proposed Fix:
Update the type hint for the data parameter in the documentation to include dict as an acceptable type:

python
Copy code
data: dict | str | bytes | None = None