fix(build): Increase size limit for browser+tracing bundle (#2899)

25K because it's the ceiling of where we are now, so it stops us from being perma-red, but also will alert us to any significant growth in the combined bundle size.

.size-limit.js

@@ -21,6 +21,6 @@ module.exports = [
     name: '@sentry/browser + @sentry/tracing - CDN Bundle (gzipped)',
     path: 'packages/tracing/build/bundle.tracing.min.js',
     gzip: true,
-    limit: '23 KB',
+    limit: '25 KB',
   },
 ];