pleroma.instance: Fix Exiftool module name

CHANGELOG.md

@@ -72,6 +72,9 @@ switched to a new configuration mechanism, however it was not officially removed
 ### Changed
 - API: Empty parameter values for integer parameters are now ignored in non-strict validaton mode.
 
+### Fixes
+- Config generation: rename `Pleroma.Upload.Filter.ExifTool` to `Pleroma.Upload.Filter.Exiftool`
+
 ## [2.1.2] - 2020-09-17
 
 ### Security

lib/mix/tasks/pleroma/instance.ex

@@ -284,7 +284,7 @@ defp write_robots_txt(static_dir, indexable, template_dir) do
   defp upload_filters(filters) when is_map(filters) do
     enabled_filters =
       if filters.strip do
-        [Pleroma.Upload.Filter.ExifTool]
+        [Pleroma.Upload.Filter.Exiftool]
       else
         []
       end

test/mix/tasks/pleroma/instance_test.exs

@@ -88,7 +88,7 @@ test "running gen" do
     assert generated_config =~ "password: \"dbpass\""
     assert generated_config =~ "configurable_from_database: true"
     assert generated_config =~ "http: [ip: {127, 0, 0, 1}, port: 4000]"
-    assert generated_config =~ "filters: [Pleroma.Upload.Filter.ExifTool]"
+    assert generated_config =~ "filters: [Pleroma.Upload.Filter.Exiftool]"
     assert File.read!(tmp_path() <> "setup.psql") == generated_setup_psql()
     assert File.exists?(Path.expand("./test/instance/static/robots.txt"))
   end