Added/updated snippets for docs (#2318)

docs/doc_examples/91cbeeda86b4e4e393fc79d4e3a4a781.asciidoc

@@ -0,0 +1,25 @@
+// This file is autogenerated, DO NOT EDIT
+// Use `node scripts/generate-docs-examples.js` to generate the docs examples
+
+[source, js]
+----
+const response = await client.search({
+  index: "stackoverflow",
+  size: 0,
+  query: {
+    query_string: {
+      query: "tags:kibana OR tags:javascript",
+    },
+  },
+  aggs: {
+    low_quality_keywords: {
+      significant_terms: {
+        field: "tags",
+        size: 3,
+        exclude: ["kibana", "javascript"],
+      },
+    },
+  },
+});
+console.log(response);
+----