Added/updated snippets for docs (#2318)

docs/doc_examples/5302f4f2bcc0f400ff71c791e6f68d7b.asciidoc

@@ -0,0 +1,18 @@
+// 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.analyze({
+  tokenizer: "whitespace",
+  filter: [
+    {
+      type: "keyword_marker",
+      keywords: ["jumping"],
+    },
+    "stemmer",
+  ],
+  text: "fox running and jumping",
+});
+console.log(response);
+----