[Radar] Update changelog

Author: andre-j3sus

src/content/changelog/radar/2025-08-04-radar-ct-insights.mdx

@@ -35,4 +35,4 @@ For the `summary` and `timeseries_groups` endpoints, the following dimensions ar
 - `tld`: Top-level domain for DNS names found in certificates SANs
 - `validation_level`: [Validation level](https://www.cloudflare.com/learning/ssl/types-of-ssl-certificates/)
 
-Learn more about the new Certificate Transparency insights in our [blog post](https://blog.cloudflare.com/new-ct-section-on-cloudflare-radar/), and check out the [new Radar page](https://radar.cloudflare.com/certificate-transparency).
+Check out the new Certificate Transparency insights in the [new Radar page](https://radar.cloudflare.com/certificate-transparency).