Added/updated snippets for docs (#2318)

docs/doc_examples/6c3f7c8601e8cc13d36eef98a5e2cb34.asciidoc

@@ -0,0 +1,33 @@
+// 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.indices.create({
+  index: "drivers",
+  mappings: {
+    properties: {
+      driver: {
+        type: "nested",
+        properties: {
+          last_name: {
+            type: "text",
+          },
+          vehicle: {
+            type: "nested",
+            properties: {
+              make: {
+                type: "text",
+              },
+              model: {
+                type: "text",
+              },
+            },
+          },
+        },
+      },
+    },
+  },
+});
+console.log(response);
+----