Add release notes for edge-18.12.2 release
+## edge-18.12.2
+
+Upgrade notes: The control plane components have been renamed as of the
+edge-18.12.1 release to reduce possible naming collisions. To upgrade an
+older installation, see the [Upgrade Guide](https://linkerd.io/2/upgrade/).
+
+* Controller
+ * Rename snake case fields to camel case in service profile spec
+
## edge-18.12.1
Upgrade notes: The control plane components have been renamed in this release to
