Fix allowlist / blocklist description location. Fixes #2214 (#2215)

* Fix allowlist / blocklist description location. Fixes #2214

* Fix allowlist check

config/defaults.hjson

@@ -45,7 +45,7 @@
     # Whether to enable activitypub federation.
     enabled: false
     # Allows and blocks are described here:
-    # https://join-lemmy.org/docs/en/federation/administration.html///instance-allowlist-and-blocklist
+    # https://join-lemmy.org/docs/en/administration/federation_getting_started.html
     # 
     # list of instances with which federation is allowed
     allowed_instances: [

crates/utils/src/settings/structs.rs

@@ -115,7 +115,7 @@ pub struct FederationConfig {
   #[default(false)]
   pub enabled: bool,
   /// Allows and blocks are described here:
-  /// https://join-lemmy.org/docs/en/federation/administration.html///instance-allowlist-and-blocklist
+  /// https://join-lemmy.org/docs/en/administration/federation_getting_started.html
   ///
   /// list of instances with which federation is allowed
   #[default(None)]