Added/updated snippets for docs (#2318)

docs/doc_examples/4bfcb2861f1d572bd0d66acd66deab0b.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.ml.updateDatafeed({
+  datafeed_id: "datafeed-test-job",
+  query: {
+    term: {
+      "geo.src": "US",
+    },
+  },
+});
+console.log(response);
+----