Serverless page should mention it's using the same account file

[jyu00]

URL to the relevant documentation

https://docs.quantum.ibm.com/guides/qiskit-serverless

Select all that apply

• [ ] typo
• [ ] code bug
• [ ] out-of-date content
• [ ] broken link
• [X] other

Describe the fix.

The code example on this page has

serverless = IBMServerlessClient("YOUR_IBM_QUANTUM_TOKEN")

It should mention that you can use save_account() to save the account credential. More importantly, if you do use save_account, it uses the same file as QiskitRuntimeService.save_account()! People may inadvertently overwrite that file if they don't know both services use the same one.

cc @pandasa123, @jenglick

[abbycross]

Addressing in https://github.com/Qiskit/documentation/pull/1783/commits/88dac2e3206c180d50f70ef754e2939f644b7daa

[abbycross]

Merged!