Add MKDocs to Civic Tech Jobs technologies (#8568)

Co-authored-by: popart456 <popart683@gmail.com>

Author: viet456

_projects/civic-tech-jobs.md

@@ -97,6 +97,7 @@ technologies:
   - PostgreSQL
   - Django
   - Figma
+  - MKDocs
 tools:
 location:
   - Remote