Update concordance lists

src/MDConcActor.php

@@ -140,6 +140,7 @@ final class MDConcActor implements MDImporterConcordanceListInterface {
         "Interviewer*in" => 1,
         "Juwelier" => 1,
         "Juwelier und Uhrmacher" => 1,
+        "K" => 1,
         "Katograf" => 1,
         "Keramiker" => 1,
         "Keramikerin" => 1,