Added/updated snippets for docs (#2318)

docs/doc_examples/f6edbed2b5b2709bbc13866a4780e27a.asciidoc

@@ -0,0 +1,23 @@
+// 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,
+  document: {
+    username: "johnsmith",
+    name: {
+      first: "John",
+      last: "Smith",
+    },
+  },
+});
+console.log(response);
+
+const response1 = await client.indices.getMapping({
+  index: "my-index-000001",
+});
+console.log(response1);
+----