chore: remove resolution-mode=highest in template .npmrc

[oekazuma]

In pnpm v8.7.0, the resolution-mode is now set to highest by default.
Thus, I believe it is possible to remove the settings previously made in this PR

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[dummdidumm]

Agree, but let's wait a few more weeks to ensure more people have upgraded to that version

[ghostdevv]

Deployment targets like Cloudflare are still installing 8.2 even though there have been important bug fixes in versions like 8.6 :/ Maybe it's worth waiting a while longer or nagging everyone a bit more to stay up to date (I have tried with Cloudflare specifically)

[benmccann]

I think it shouldn't matter what version is on cloudflare because the lockfile will be used. But people will need to update locally to generate the correct lockfile