Highlighting change of the default config key.

[jonathonhawkins92]

While migrating I failed to spot this change and almost caused a prod bug, so I'm proposing this change to avoid anyone else also doing so 👍

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tannerlinsley/react-query: basic	Configuration
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[TkDodo]

almost caused a prod bug

can't help but say "TypeScript" :)

[jonathonhawkins92]

almost caused a prod bug

can't help but say "TypeScript" :)

I know I know, we are in the process of migrating 😄

[tannerlinsley]

🎉 This PR is included in version 3.13.11 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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