Merge pull request jupyterhub#2758 from jupyterhub/dependabot/pip/images/minesweeper/urllib3-1.26.17

Bump urllib3 from 1.26.9 to 1.26.17 in /images/minesweeper

Author: manics

images/minesweeper/requirements.txt

@@ -45,7 +45,7 @@ six==1.16.0
     #   google-auth
     #   kubernetes
     #   python-dateutil
-urllib3==1.26.9
+urllib3==1.26.17
     # via
     #   kubernetes
     #   requests