Update README.md and documentation at supabase-py web documentation

[yogendraapawar]

I tried to sign in using supabase.auth.sign_in_with_password but it wasn't working, instead it worked for below code

res = supabase.auth.sign_in(email=email, password=password)

What kind of change does this PR introduce?

docs update

What is the current behavior?

In my case data = supabase.auth.sign_in_with_password({"email": "j0@supabase.io", "password": "testsupabasenow"}) didn't work
Instead data = supabase.auth.sign_in({"email": "j0@supabase.io", "password": "testsupabasenow"}) worked

What is the new behavior?

This should be mentioned or corrected in the documentation provided here

Additional context

None

[sourcery-ai]

We have skipped reviewing this pull request. All the files appear to be documentation files, which we're not great at reviewing... yet!

[silentworks]

The README is correct, you are likely using the supabase-py library instead of the supabase library. You can see the issue here surrounding the library name #602

[yogendraapawar]

The README is correct, you are likely using the supabase-py library instead of the supabase library. You can see the issue here surrounding the library name #602

Thank you so much, it resolved my issue!!!