Apply suggestions from code review

Author: nikolajlauridsen

17/umbraco-cms/SUMMARY.md

@@ -45,6 +45,7 @@
     * [Umbraco in Load Balanced Environments](fundamentals/setup/server-setup/load-balancing/README.md)
       * [Load Balancing Azure Web Apps](fundamentals/setup/server-setup/load-balancing/azure-web-apps.md)
       * [Load Balancing the Backoffice](fundamentals/setup/server-setup/load-balancing/load-balancing-backoffice.md)
+      * [SignalR In Load Balanced Environments](fundamentals/setup/server-setup/load-balancing/signalR-in-backoffice-load-balanced-environment.md)
       * [Standalone File System](fundamentals/setup/server-setup/load-balancing/file-system-replication.md)
       * [Advanced Techniques With Flexible Load Balancing](fundamentals/setup/server-setup/load-balancing/flexible-advanced.md)
       * [Logging With Load Balancing](fundamentals/setup/server-setup/load-balancing/logging.md)

17/umbraco-cms/fundamentals/setup/server-setup/load-balancing/load-balancing-backoffice.md

@@ -25,9 +25,9 @@ umbracoBuilder.SetServerRegistrar(new StaticServerAccessor());
 
 This will ensure that all servers are treated as backoffice servers.
 
-## Load balancing Isolated Caches
+## Load balancing Repository Caches
 
-One of the issues with load balancing the backoffice is that all servers will have their own isolated caches. This means that if you make a change on one server, it won't be reflected on the other servers until their cache expires.
+One of the issues with load balancing the backoffice is that all servers will have their own repository caches. This means that if you make a change on one server, it won't be reflected on the other servers until their cache expires.
 
 To solve this issue, a cache versioning mechanism is used. This is similar to optimistic concurrency control. Each server has a version number for its cache. When a server makes a change, it updates the version identifier. The other servers can then check the version identifier before accessing the cache. If the cache is out of date, they invalidate it.