add note about Solr dir for Docker users #11367

Author: pdurbin

doc/release-notes/6.7-release-notes.md

@@ -650,6 +650,8 @@ chmod +x update-fields.sh
 curl "http://localhost:8080/api/admin/index/solr/schema" | ./update-fields.sh /usr/local/solr/solr-9.8.0/server/solr/collection1/conf/schema.xml
 ```
 
+Note that Docker-based installations use a different directory: `solr/data/data/collection1/conf/schema.xml`.
+
 - Start Solr instance (usually `service solr start` depending on Solr/OS).
 
 14\. Reindex Solr