rename frontend-proxy

Author: puckpuck

CHANGELOG.md

@@ -68,6 +68,8 @@ the release.
   ([#1864](https://github.com/open-telemetry/opentelemetry-demo/pull/1864))
 * [checkout] rename checkoutservice to checkout
   ([#1867](https://github.com/open-telemetry/opentelemetry-demo/pull/1867))
+* [frontend-proxy] rename frontendproxy to frontend-proxy
+  ([#1910](https://github.com/open-telemetry/opentelemetry-demo/pull/1910))
 
 ## 1.12.0