Added/updated snippets for docs (#2318)

docs/doc_examples/5024c524a7db0d6bb44c1820007cc5f4.asciidoc

@@ -0,0 +1,29 @@
+// 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.ingest.simulate({
+  pipeline: {
+    description: "...",
+    processors: [
+      {
+        grok: {
+          field: "message",
+          patterns: [
+            "%{IP:client} %{WORD:method} %{URIPATHPARAM:request} %{NUMBER:bytes:int} %{NUMBER:duration:double}",
+          ],
+        },
+      },
+    ],
+  },
+  docs: [
+    {
+      _source: {
+        message: "55.3.244.1 GET /index.html 15824 0.043",
+      },
+    },
+  ],
+});
+console.log(response);
+----