GC fundamentals clean up (#15761)

* fixes #12783

* add in ron's change from pr #12959

* Update docs/standard/garbage-collection/fundamentals.md

Co-Authored-By: Next Turn <45985406+NextTurn@users.noreply.github.com>

* review feedback from maoni and bill

* remove config section; add link to new doc; acrolinx

* add links to specific config settings

Author: gewarren

docs/core/run-time-config/garbage-collector.md

@@ -28,7 +28,6 @@ Use the following settings to select flavors of garbage collection:
 
 - Configures whether the application uses workstation garbage collection or server garbage collection.
 - Default: Workstation garbage collection (`false`).
-- For more information, see [Configure garbage collection](../../standard/garbage-collection/fundamentals.md#configuring-garbage-collection).
 
 | | Setting name | Values | Version introduced |
 | - | - | - | - |

docs/framework/configure-apps/file-schema/runtime/gccpugroup-element.md

@@ -12,7 +12,7 @@ Specifies whether garbage collection supports multiple CPU groups.
 
 [**\<configuration>**](../configuration-element.md)\
 &nbsp;&nbsp;[**\<runtime>**](runtime-element.md)\
-&nbsp;&nbsp;&nbsp;&nbsp;**\<GCCpuGroup>**  
+&nbsp;&nbsp;&nbsp;&nbsp;**\<GCCpuGroup>**
 
 ## Syntax