Switch to test using python 3.11 for dandi-cli

Primary motivator is that macos-latest swiched to arm64 and
does not have support for python 3.8 and 3.9 . Comment in the
CI says to match version used by dandi-api for some reason.
There we use 3.11 ATM:

    ❯ git grep '\<3\.' -- .github/workflows/
    .github/workflows/backend-ci.yml:          python-version: "3.11"
    .github/workflows/cli-integration.yml:          - "3.11"
    .github/workflows/frontend-ci.yml:          python-version: '3.11'
    .github/workflows/frontend-ci.yml:        python-version: '3.11'
    ❯ git describe
    v0.3.83

.github/workflows/test-dandi-cli.yml

@@ -25,10 +25,10 @@ jobs:
         python:
           # Use the only Python which is ATM also used by dandi-api
           # - 3.7
-          - 3.8
+          # - 3.8
           # - 3.9
           # - '3.10'
-          # - '3.11'
+          - '3.11'
         version:
           - master
           - release