docs: angular unleash proxy client (#3897)

List of community unleash proxy clients extended with new Angular
library

## About the changes
Relates to
[discussion](https://github.com/orgs/Unleash/discussions/3621)

website/docs/reference/sdks/index.md

@@ -107,6 +107,7 @@ If you see an item marked with a ❌ that you would find useful, feel free to re
 
 Here's some of the fantastic work our community has done to make Unleash work in even more contexts. If you still can't find your favorite language, let us know and we'd love to help you create the client for it!
 
+- Angular - TypeScript ([angular-unleash-proxy-client](https://github.com/Karelics/angular-unleash-proxy-client) by [Karelics](https://karelics.fi/unleash-feature-flags-with-gitlab/))
 - Angular - TypeScript ([ngx-unleash-proxy-client](https://github.com/snowfrogdev/snowfrogdev/tree/main/packages/ngx-unleash-proxy-client))
 - Clojure ([AppsFlyer/clojure-unleash](https://github.com/AppsFlyer/unleash-client-clojure))
 - C++ ([aruizs/unleash-client-cpp](https://github.com/aruizs/unleash-client-cpp))