Update docs/apis-tools/operate-api/tutorial.md

Oleksiivanov · github-actions[bot] · web-flow · commit 9d067830a0c8 · 2024-02-13T10:42:54.000+02:00
Co-authored-by: github-actions[bot] &lt;41898282+github-actions[bot]@users.noreply.github.com&gt;
diff --git a/docs/apis-tools/operate-api/tutorial.md b/docs/apis-tools/operate-api/tutorial.md
@@ -82,7 +82,7 @@ node server.js
 1. Create an `index.html` file and include the `bpmn-js` script:
 
 ```html
-<!DOCTYPE html>
+<!doctype html>
 <html>
   <head>
     <script src="https://unpkg.com/bpmn-js/dist/bpmn-viewer.development.js"></script>
