HybridCache GA: remove preview and not-implemented caveats (#34958)

* remove preview and not-implemented caveats

* trailing quote

Author: mgravell

aspnetcore/performance/caching/hybrid.md

@@ -9,22 +9,14 @@ uid: performance/caching/hybrid
 ---
 # HybridCache library in ASP.NET Core
 
-> [!IMPORTANT]
-> `HybridCache` is currently still in preview but will be fully released *after* .NET 9.0 in a future minor release of .NET Extensions.
-
-<!--
-[!INCLUDE[](~/includes/not-latest-version.md)] 
-Uncomment this when 9.0 is the default value in the version selector.
--->
-
 This article explains how to configure and use the `HybridCache` library in an ASP.NET Core app. For an introduction to the library, see [the `HybridCache` section of the Caching overview](xref:performance/caching/overview#hybridcache).
 
 ## Get the library
 
 Install the `Microsoft.Extensions.Caching.Hybrid` package.
 
 ```dotnetcli
-dotnet add package Microsoft.Extensions.Caching.Hybrid --version "9.0.0-preview.7.24406.2"
+dotnet add package Microsoft.Extensions.Caching.Hybrid
 ```
 
 ## Register the service
@@ -117,9 +109,6 @@ When an entry is removed, it is removed from both the primary and secondary cach
 
 ## Remove cache entries by tag
 
-> [!IMPORTANT]
-> This feature is still under development. If you try to remove entries by tag, you will notice that it doesn't have any effect.
-
 Tags can be used to group cache entries and invalidate them together.
 
 Set tags when calling `GetOrCreateAsync`, as shown in the following example:
@@ -230,7 +219,7 @@ dotnet add package Microsoft.Extensions.Caching.SqlServer
 
 ## Custom HybridCache implementations
 
-A concrete implementation of the `HybridCache` abstract class is included in the shared framework and is provided via dependency injection. But developers are welcome to provide custom implementations of the API.
+A concrete implementation of the `HybridCache` abstract class is included in the shared framework and is provided via dependency injection. But developers are welcome to provide or consume custom implementations of the API, for example [FusionCache](https://github.com/ZiggyCreatures/FusionCache/blob/main/docs/MicrosoftHybridCache.md).
 
 ## Compatibility