Migrate admin middleware to internal

nixos/viridian/containers/lidarr.nix

@@ -34,7 +34,7 @@ in
         "websecure"
       ];
       middlewares = [
-        "admin"
+        "internal"
       ];
       service = "lidarr";
     };

nixos/viridian/containers/prowlarr.nix

@@ -31,7 +31,7 @@ in
         "websecure"
       ];
       middlewares = [
-        "admin"
+        "internal"
       ];
       service = "prowlarr";
     };

nixos/viridian/containers/qbittorrent.nix

@@ -34,7 +34,7 @@ in
         "websecure"
       ];
       middlewares = [
-        "admin"
+        "internal"
       ];
       service = "qbittorrent";
     };

nixos/viridian/containers/radarr.nix

@@ -33,7 +33,7 @@ in
         "websecure"
       ];
       middlewares = [
-        "admin"
+        "internal"
       ];
       service = "radarr";
     };

nixos/viridian/containers/sonarr.nix

@@ -34,7 +34,7 @@ in
         "websecure"
       ];
       middlewares = [
-        "admin"
+        "internal"
       ];
       service = "sonarr";
     };