add sealskin to selkies blurb

Author: thelamer

ansible/roles/documentation/templates/README_SNIPPETS/SELKIES.j2

@@ -74,6 +74,15 @@ To launch the desktop session in a different language, set the `LC_ALL` environm
 *   `-e LC_ALL=nl_NL.UTF-8` - Netherlands
 *   `-e LC_ALL=it_IT.UTF-8` - Italian
 
+### SealSkin Compatibility
+
+This container is compatible with [SealSkin](https://github.com/linuxserver/docker-sealskin).
+
+SealSkin is a self-hosted, client-server platform that provides secure authentication and collaboration features while using a browser extension to intercept user actions such as clicking a link or downloading a file and redirect them to a secure, isolated application environment running on a remote server.
+
+*   **SealSkin Server:** [Get it Here](https://github.com/linuxserver/docker-sealskin)
+*   **Browser Extension:** [Install Here](https://chromewebstore.google.com/detail/sealskin-isolation/lclgfmnljgacfdpmmmjmfpdelndbbfhk)
+
 ### DRI3 GPU Acceleration
 
 For accelerated apps or games, render devices can be mounted into the container and leveraged by applications using: