Update chicago-author-date.csl (#5605)

Edit to show interviewer in the reference list as discussed here: https://forums.zotero.org/discussion/comment/369403/#Comment_369403
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Author: jotaemi

chicago-author-date.csl

@@ -526,7 +526,7 @@
   </macro>
   <macro name="description">
     <choose>
-      <if type="interview">
+      <if variable="interviewer" type="interview" match="any">
         <group delimiter=". ">
           <text macro="interviewer"/>
           <text variable="medium" text-case="capitalize-first"/>