fix docker tag for cuda

[masci]

Related Issue(s): failed build

The existing nvidia/cuda:11.1-runtime-ubuntu20.04 isn't available anymore on Dockerhub and the build is failing. 1.11.1 was published 2 months ago, most likely the 11.1 was recently removed.

Proposed changes:

• Use nvidia/cuda:11.1.1-runtime-ubuntu20.04 instead (this will also pick up the latest bugfix release)

Pre-flight checklist

• I have read the contributors guidelines
• I have enabled actions on my fork
• If this is a code change, I added tests or updated existing ones
• If this is a code change, I updated the docstrings