Added/updated snippets for docs (#2318)

docs/doc_examples/3c36dc17359c6b6b6a40d04da9293fa7.asciidoc

@@ -0,0 +1,32 @@
+// 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.search({
+  size: 0,
+  aggs: {
+    my_date_histo: {
+      date_histogram: {
+        field: "date",
+        calendar_interval: "1M",
+      },
+      aggs: {
+        the_sum: {
+          sum: {
+            field: "price",
+          },
+        },
+        the_movavg: {
+          moving_fn: {
+            buckets_path: "the_sum",
+            window: 10,
+            script: "MovingFunctions.unweightedAvg(values)",
+          },
+        },
+      },
+    },
+  },
+});
+console.log(response);
+----