Use Image type for emoji icons.

lib/pleroma/web/common_api/utils.ex

@@ -203,7 +203,7 @@ def emoji_from_profile(%{info: info} = user) do
     |> Enum.map(fn {shortcode, url} ->
       %{
         "type" => "Emoji",
-        "icon" => %{"url" => "#{Endpoint.url()}#{url}"},
+        "icon" => %{"type" => "Image", "url" => "#{Endpoint.url()}#{url}"},
         "name" => ":#{shortcode}:"
       }
     end)

test/web/common_api/common_api_utils_test.exs

@@ -37,12 +37,12 @@ test "parses emoji from name and bio" do
     expected = [
       %{
         "type" => "Emoji",
-        "icon" => %{"url" => "#{Endpoint.url()}/finmoji/128px/perkele-128.png"},
+        "icon" => %{"type" => "Image", "url" => "#{Endpoint.url()}/finmoji/128px/perkele-128.png"},
         "name" => ":perkele:"
       },
       %{
         "type" => "Emoji",
-        "icon" => %{"url" => "#{Endpoint.url()}/finmoji/128px/karjalanpiirakka-128.png"},
+        "icon" => %{"type" => "Image", "url" => "#{Endpoint.url()}/finmoji/128px/karjalanpiirakka-128.png"},
         "name" => ":karjalanpiirakka:"
       }
     ]