fix(docs): Correct indentation in documented example for access_policy (#3652)

`access_policy` needs to be inside the `auth` section in config; this PR
corrects indentation in a documented example of configuring that
section.

Author: anastasds

docs/docs/distributions/configuration.mdx

@@ -509,16 +509,16 @@ server:
     provider_config:
       type: "github_token"
       github_api_base_url: "https://api.github.com"
-  access_policy:
-  - permit:
-      principal: user-1
-      actions: [create, read, delete]
-    description: user-1 has full access to all resources
-  - permit:
-      principal: user-2
-      actions: [read]
-      resource: model::model-1
-    description: user-2 has read access to model-1 only
+    access_policy:
+    - permit:
+        principal: user-1
+        actions: [create, read, delete]
+      description: user-1 has full access to all resources
+    - permit:
+        principal: user-2
+        actions: [read]
+        resource: model::model-1
+      description: user-2 has read access to model-1 only
 ```
 
 Similarly, the following restricts access to particular kubernetes