misc: Remove new lines from changelog lists to make rendering unified

[kamilogorek]

Before:

After:

[github-actions]

size-limit report 📦

Path	Size
@sentry/browser - ES5 CDN Bundle (gzipped + minified)	19.35 KB (-3.93% 🔽)
@sentry/browser - ES5 CDN Bundle (minified)	60.04 KB (-7.09% 🔽)
@sentry/browser - ES6 CDN Bundle (gzipped + minified)	18.2 KB (-3.53% 🔽)
@sentry/browser - ES6 CDN Bundle (minified)	53.65 KB (-7.45% 🔽)
@sentry/browser - Webpack (gzipped + minified)	19.92 KB (-14.29% 🔽)
@sentry/browser - Webpack (minified)	63.11 KB (-22.77% 🔽)
@sentry/react - Webpack (gzipped + minified)	19.94 KB (-14.33% 🔽)
@sentry/nextjs Client - Webpack (gzipped + minified)	43.73 KB (-9% 🔽)
@sentry/browser + @sentry/tracing - ES5 CDN Bundle (gzipped + minified)	25.37 KB (-2.71% 🔽)
@sentry/browser + @sentry/tracing - ES6 CDN Bundle (gzipped + minified)	23.9 KB (-2.37% 🔽)