Fix typo

Author: eberhardtj

example/to-solr-from-xml.flux

@@ -2,4 +2,4 @@
 | open-file
 | decode-xml
 | handle-solr-xml
-| to-solr("http://localhost:1111/solr/", core="test6", commitWithinMs="1000");
+| to-solr("http://localhost:1111/solr/", core="test", commitWithinMs="1000");