Added/updated snippets for docs (#2318)

docs/doc_examples/532ddf9afdcd0b1c9c0bb331e74d8df3.asciidoc

@@ -0,0 +1,17 @@
+// 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: "index_long",
+  mappings: {
+    properties: {
+      field: {
+        type: "long",
+      },
+    },
+  },
+});
+console.log(response);
+----