Broken link on cirq_ionq GPIGate pages

[natestemen]

live page: https://quantumai.google/reference/python/cirq_ionq/ionq_native_gates/GPIGate
code:

Cirq/cirq-ionq/cirq_ionq/ionq_native_gates.py

Line 42 in c7e91ce

See [IonQ best practices](https://ionq.com/docs/getting-started-with-native-gates){:external}.

(and a few other places in this file)

@splch any idea what should replace this link, or should we remove the line altogether?

[splch]

nice find! the new link points to our docs subdomain: https://docs.ionq.com/guides/getting-started-with-native-gates @natestemen