Merge pull request #1884 from jupyterhub/dependabot/pip/images/minesweeper/urllib3-1.26.4

build(deps): bump urllib3 from 1.26.3 to 1.26.4 in /images/minesweeper

Author: minrk

images/minesweeper/requirements.txt

@@ -44,7 +44,7 @@ six==1.15.0
     #   kubernetes
     #   python-dateutil
     #   websocket-client
-urllib3==1.26.3
+urllib3==1.26.4
     # via
     #   kubernetes
     #   requests