fix(deps): update nextjs monorepo to v15.4.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
eslint-config-next (source)	15.4.6 -> 15.4.7
next (source)	15.4.6 -> 15.4.7

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Release Notes

vercel/next.js (eslint-config-next)

v15.4.7

Compare Source

vercel/next.js (next)

v15.4.7

Compare Source

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