Documentation for HasuraAuthClient references refreshToken instead of refreshSession

[lightstrike]

Describe the bug See hasura-auth-client.ts - example documentation shows refreshToken while the correct function name is refreshSession.

To Reproduce Steps to reproduce the behavior:

1. Go to hasura-auth-client.ts
2. Compare lines 659, 662 and 667.

Expected behavior Rename function name in example docs to refreshSession.

[stale[bot]]

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