Added/updated snippets for docs (#2318)

docs/doc_examples/7fe9f0a583e079f7fc6fd64d12b6e9e5.asciidoc

@@ -0,0 +1,34 @@
+// 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({
+  index: "sales",
+  size: 0,
+  runtime_mappings: {
+    "price.weighted": {
+      type: "double",
+      script:
+        "\n        double price = doc['price'].value;\n        if (doc['promoted'].value) {\n          price *= 0.8;\n        }\n        emit(price);\n      ",
+    },
+  },
+  query: {
+    constant_score: {
+      filter: {
+        match: {
+          type: "hat",
+        },
+      },
+    },
+  },
+  aggs: {
+    hat_prices: {
+      sum: {
+        field: "price.weighted",
+      },
+    },
+  },
+});
+console.log(response);
+----