ci(v7): Bump to ubuntu-24.04

[mydea]

ubuntu-20.04 is no longer working, so CI is no longer working and nothing can be merged in v7 :O

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser (incl. Tracing, Replay, Feedback) - Webpack (gzipped)	80.96 KB (added)
@sentry/browser (incl. Tracing, Replay) - Webpack (gzipped)	71.9 KB (added)
@sentry/browser (incl. Tracing, Replay with Canvas) - Webpack (gzipped)	76.15 KB (added)
@sentry/browser (incl. Tracing, Replay) - Webpack with treeshaking flags (gzipped)	65.53 KB (added)
@sentry/browser (incl. Tracing) - Webpack (gzipped)	35.78 KB (added)
@sentry/browser (incl. browserTracingIntegration) - Webpack (gzipped)	35.67 KB (added)
@sentry/browser (incl. Feedback) - Webpack (gzipped)	31.71 KB (added)
@sentry/browser (incl. sendFeedback) - Webpack (gzipped)	31.73 KB (added)
@sentry/browser - Webpack (gzipped)	22.92 KB (added)
@sentry/browser (incl. Tracing, Replay, Feedback) - ES6 CDN Bundle (gzipped)	79.18 KB (added)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (gzipped)	70.5 KB (added)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (gzipped)	36.17 KB (added)
@sentry/browser - ES6 CDN Bundle (gzipped)	25.42 KB (added)
@sentry/browser (incl. Tracing, Replay) - ES6 CDN Bundle (minified & uncompressed)	221.94 KB (added)
@sentry/browser (incl. Tracing) - ES6 CDN Bundle (minified & uncompressed)	109.54 KB (added)
@sentry/browser - ES6 CDN Bundle (minified & uncompressed)	76.26 KB (added)
@sentry/browser (incl. Tracing) - ES5 CDN Bundle (gzipped)	39.45 KB (added)
@sentry/react (incl. Tracing, Replay) - Webpack (gzipped)	72.4 KB (added)
@sentry/react - Webpack (gzipped)	22.95 KB (added)
@sentry/nextjs Client (incl. Tracing, Replay) - Webpack (gzipped)	90.16 KB (added)
@sentry/nextjs Client - Webpack (gzipped)	54.28 KB (added)
@sentry-internal/feedback - Webpack (gzipped)	17.34 KB (added)