remove stray backticks in solrcloud-distributed-requests.adoc (#2401)

diff --git a/solr/solr-ref-guide/modules/deployment-guide/pages/solrcloud-distributed-requests.adoc b/solr/solr-ref-guide/modules/deployment-guide/pages/solrcloud-distributed-requests.adoc
index 48f5331..7eb756a 100644
--- a/solr/solr-ref-guide/modules/deployment-guide/pages/solrcloud-distributed-requests.adoc
+++ b/solr/solr-ref-guide/modules/deployment-guide/pages/solrcloud-distributed-requests.adoc
@@ -266,7 +266,7 @@
 * Prefer any replica that is not a leader:
 +
 [source,text]
-`shards.preference=replica.leader:false`
+shards.preference=replica.leader:false
 
 Note that if you provide these parameters in a query string, they need to be properly URL-encoded.