[MINOR][DOC] Update algolia index name

Refer https://github.com/algolia/docsearch-configs/pull/2943
diff --git a/docs/_includes/scripts.html b/docs/_includes/scripts.html
index f4a344e..965c62c 100644
--- a/docs/_includes/scripts.html
+++ b/docs/_includes/scripts.html
@@ -75,11 +75,11 @@
 
     docsearch({
         apiKey: '78c19564c220d4642a41197baae304ef',
-        indexName: 'apache_systemml',
+        indexName: 'apache_systemds',
         inputSelector: "#s-bar",
         // For custom styling for the dropdown, please set debug to true
         // so that the dropdown won't disappear when the inspect tools are 
         // open.
         debug: false
     });
-</script>
\ No newline at end of file
+</script>