Merge branch 'small-fix-rewrite_policy' into 'develop'

small fix in the rewrite_policy example

See merge request pleroma/pleroma!2391

docs/configuration/mrf.md

@@ -113,7 +113,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.RewritePolicy do
 
   @impl true
   def describe do
-    {:ok, %{mrf_sample: %{content: "new message content"}}}`
+    {:ok, %{mrf_sample: %{content: "new message content"}}}
   end
 end
 ```