use proper naming

for MediaProxyWarmingPolicy in ConcurrentLimiter

config/description.exs

@@ -3358,7 +3358,7 @@
         ]
       },
       %{
-        key: Pleroma.Web.MediaProxy,
+        key: Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy,
         type: :keyword,
         description: "Concurrent limits configuration for MediaProxyWarmingPolicy.",
         suggestions: [max_running: 5, max_waiting: 5],

docs/configuration/cheatsheet.md

@@ -1116,7 +1116,7 @@ Settings to enable and configure expiration for ephemeral activities
 Settings to restrict concurrently running jobs. Jobs which can be configured:
 
 * `Pleroma.Web.RichMedia.Helpers` - generating link previews of URLs in activities
-* `Pleroma.Web.MediaProxy` - fetching remote media via MediaProxy
+* `Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy` - warming remote media cache via MediaProxyWarmingPolicy
 
 Each job has these settings:
 

lib/pleroma/application.ex

@@ -299,7 +299,7 @@ defp http_children(_, _), do: []
   def limiters_setup do
     config = Config.get(ConcurrentLimiter, [])
 
-    [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.MediaProxy]
+    [Pleroma.Web.RichMedia.Helpers, Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy]
     |> Enum.each(fn module ->
       mod_config = Keyword.get(config, module, [])
 

lib/pleroma/web/activity_pub/mrf/media_proxy_warming_policy.ex

@@ -27,7 +27,7 @@ defp prefetch(url) do
       if Pleroma.Config.get(:env) == :test do
         fetch(prefetch_url)
       else
-        ConcurrentLimiter.limit(MediaProxy, fn ->
+        ConcurrentLimiter.limit(__MODULE__, fn ->
           Task.start(fn -> fetch(prefetch_url) end)
         end)
       end