Added/updated snippets for docs (#2318)

docs/doc_examples/6326f5c6fd2a6e6b1aff9a643b94f455.asciidoc

@@ -0,0 +1,47 @@
+// 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.index({
+  index: "my-index-000001",
+  id: 1,
+  refresh: "true",
+  document: {
+    text: "quick brown fox",
+    popularity: 1,
+  },
+});
+console.log(response);
+
+const response1 = await client.index({
+  index: "my-index-000001",
+  id: 2,
+  refresh: "true",
+  document: {
+    text: "quick fox",
+    popularity: 5,
+  },
+});
+console.log(response1);
+
+const response2 = await client.search({
+  index: "my-index-000001",
+  query: {
+    function_score: {
+      query: {
+        match: {
+          text: "quick brown fox",
+        },
+      },
+      script_score: {
+        script: {
+          lang: "expression",
+          source: "_score * doc['popularity']",
+        },
+      },
+    },
+  },
+});
+console.log(response2);
+----