Update garbage-collector.md (#31468)

Author: Maoni0

docs/core/runtime-config/garbage-collector.md

@@ -556,9 +556,7 @@ Example:
 
 ## Standalone GC
 
-- Specifies a path to the library containing the garbage collector that the runtime intends to load.
-- For more information, see [Standalone GC loader design](https://github.com/dotnet/runtime/blob/main/docs/design/features/standalone-gc-loading.md).
-
+- Specifies the name of a standalone GC DLL that the runtime loads in place of the one it has in the main runtime DLL (coreclr.dll). This DLL needs to reside in the same directory as *coreclr.dll*
 | | Setting name | Values | Version introduced |
 | - | - | - | - |
 | **runtimeconfig.json** | N/A | N/A | N/A |