add PR URL to ww changelog

Author: Lms24

packages/browser-utils/src/metrics/web-vitals/README.md

@@ -27,7 +27,7 @@ web-vitals only report once per pageload.
 
 ## CHANGELOG
 
-TODO: PR Url
+https://github.com/getsentry/sentry-javascript/pull/17076
 
 - Removed FID-related code with v10 of the SDK