Fix typo in YAML metadata

_posts/2021/06/2021-06-02-easy-diagram-creation-in-gitlab.md

 ---
 title: "Easy Diagram creation in Gitlab"
 title_image: clark-tibbs-oqStl2L5oxI-unsplash.jpg
-data: 2021-06-02
+date: 2021-06-02
 authors:
   - huste
   - jandt