Added/updated snippets for docs (#2318)

docs/doc_examples/56fa6c9e08258157d445e2f92274962b.asciidoc

@@ -0,0 +1,19 @@
+// 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: "shingle",
+      min_shingle_size: 2,
+      max_shingle_size: 3,
+      output_unigrams: false,
+    },
+  ],
+  text: "quick brown fox jumps",
+});
+console.log(response);
+----