Added/updated snippets for docs (#2318)

docs/doc_examples/82e94b6cdf65e324575f916b3776b779.asciidoc

@@ -0,0 +1,20 @@
+// 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: "my-index-000001",
+  mappings: {
+    dynamic_templates: [
+      {
+        strings_as_keywords: {
+          match_mapping_type: "string",
+          runtime: {},
+        },
+      },
+    ],
+  },
+});
+console.log(response);
+----