Added/updated snippets for docs (#2318)

docs/doc_examples/dda949d20d07a9edbe64cefc623df945.asciidoc

@@ -0,0 +1,15 @@
+// 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.putMapping({
+  index: "my_test_scores",
+  properties: {
+    total_score: {
+      type: "long",
+    },
+  },
+});
+console.log(response);
+----