Fix warnings on URLs given off by mkdocs

docs/api/v4/architecture.md

@@ -4,7 +4,7 @@
 
 ## API Entity Classes
 
-Every API entity is a class which inherits from [`\Civi\Api4\Generic\AbstractEntity`]((https://github.com/civicrm/civicrm-core/blob/master/Civi/Api4/Generic/AbstractEntity.php)). Each class serves two purposes:
+Every API entity is a class which inherits from [`\Civi\Api4\Generic\AbstractEntity`](https://github.com/civicrm/civicrm-core/blob/master/Civi/Api4/Generic/AbstractEntity.php). Each class serves two purposes:
 
 1.  Declare the API entity by its existance.
     - You can declare a new API (e.g. FooBar) simply by placing the class `\Civi\Api4\FooBar` in the `/Civi/Api4` directory of your extension, as long as it inherits from `\Civi\Api4\Generic\AbstractEntity`.
@@ -13,7 +13,7 @@ Every API entity is a class which inherits from [`\Civi\Api4\Generic\AbstractEnt
 
 ## API Action Classes
 
-Every API action is a class which inherits from [`\Civi\Api4\Generic\AbstractAction`]((https://github.com/civicrm/civicrm-core/blob/master/Civi/Api4/Generic/AbstractAction.php)). It has two functions:
+Every API action is a class which inherits from [`\Civi\Api4\Generic\AbstractAction`](https://github.com/civicrm/civicrm-core/blob/master/Civi/Api4/Generic/AbstractAction.php). It has two functions:
 
 1.  Store the parameters of the API call.
     - Every `protected` class var is considered a parameter (unless it starts with an underscore).

docs/framework/setup/index.md

@@ -16,7 +16,7 @@ Key features:
 
 General design:
 
-* Installers call a high-level API ([Civi\Setup](src/Setup.php)) which supports all major installation tasks/activities -- such as:
+* Installers call a high-level API ([Civi\Setup](https://github.com/civicrm/civicrm-core/tree/master/setup/src/Setup.php)) which supports all major installation tasks/activities -- such as:
     * Check system requirements (`$setup->checkRequirements()`)
     * Check installation status (`$setup->checkInstalled()`)
     * Install data files (`$setup->installFiles()`)