[Tooling] `firebase init genkit` shows warnings that Node 18 is required when it isn't

[apascal07]

Describe the bug

From Discord:

npm install -g firebase-tools firebase init genkit

Then it shows

...
✔  Wrote functions/src/index.ts
✔  Wrote functions/.gitignore
? Do you want to install dependencies with npm now? Yes
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: undefined,
npm warn EBADENGINE   required: { node: '18' },
npm warn EBADENGINE   current: { node: 'v20.15.0', npm: '10.7.0' }
npm warn EBADENGINE }
npm warn deprecated [email protected]: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm warn deprecated [email protected]: Glob versions prior to v9 are no longer supported

...
...

? Install the Genkit CLI globally or locally in this project? Just this project
Installing Genkit CLI
npm warn EBADENGINE Unsupported engine {
npm warn EBADENGINE   package: undefined,
npm warn EBADENGINE   required: { node: '18' },
npm warn EBADENGINE   current: { node: 'v20.15.0', npm: '10.7.0' }
npm warn EBADENGINE }

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