FIX: handle german quotes in discourse local-dates (#8386)

https://meta.discourse.org/t/insert-date-timezone-is-always-utc-my-timezone-is-ignored/126307

plugins/discourse-local-dates/assets/javascripts/lib/discourse-markdown/discourse-local-dates.js.es6

@@ -13,10 +13,12 @@ function addLocalDate(buffer, matches, state) {
     countdown: null
   };
 
+  const matchString = matches[1].replace(/„|“/g, '"');
+
   let parsed = parseBBCodeTag(
-    "[date date" + matches[1] + "]",
+    "[date date" + matchString + "]",
     0,
-    matches[1].length + 11
+    matchString.length + 11
   );
 
   config.date = parsed.attrs.date;