Update CHANGES.md for the v18.7.2 release
+## v18.7.2
+
+Linkerd2 v18.7.2 introduces new stability features as we work toward production
+readiness.
+
+* Control Plane
+ * **Breaking change** Injected pod labels have been renamed to be more
+ consistent with Kubernetes; previously injected pods must be re-injected
+ with new version of linkerd CLI in order to work with updated control plane
+ * The "ca-bundle-distributor" deployment has been renamed to "ca"
+* Proxy
+ * **Fixed** HTTP/1.1 connections were not properly reused, leading to
+ elevated latencies and CPU load
+ * **Fixed** The `process_cpu_seconds_total` was calculated incorrectly
+* Web UI
+ * **New** per-namespace application topology graph
+ * **Experimental** web-based Tap interface accessible at `/tap`
+ * Updated favicon to the Linkerd logo
+
## v18.7.1
Linkerd2 v18.7.1 is the first release of the Linkerd2 project, which was
