ref(utils): Fix comment for normalize

[mydea]

Noticed that one comment was copy-pasted but not changed 😅 So removed it and slightly refactored it to avoid re-assigning the variable. Also renamed the variable as I found it a bit confusing (it is not always overridden!), while at it.

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	21.02 KB (-0.02% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	65.66 KB (-0.01% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	19.56 KB (-0.04% 🔽)
@sentry/browser - ES6 CDN Bundle (minified)	58.12 KB (-0.01% 🔽)
@sentry/browser - Webpack (gzipped + minified)	21.17 KB (-0.02% 🔽)
@sentry/browser - Webpack (minified)	69.07 KB (-0.01% 🔽)
@sentry/react - Webpack (gzipped + minified)	21.19 KB (-0.02% 🔽)
@sentry/nextjs Client - Webpack (gzipped + minified)	49.03 KB (-0.01% 🔽)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	28.59 KB (-0.02% 🔽)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	26.82 KB (-0.02% 🔽)
@sentry/replay ES6 CDN Bundle (gzipped + minified)	46.26 KB (+0.1% 🔺)
@sentry/replay - Webpack (gzipped + minified)	40.14 KB (+0.12% 🔺)
@sentry/browser + @sentry/tracing + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	65.12 KB (+0.07% 🔺)
@sentry/browser + @sentry/replay - ES6 CDN Bundle (gzipped + minified)	58.1 KB (+0.08% 🔺)