Bump a11y-checker and test whether it fixes usability issues

deployments/a11y/image/environment.yml

@@ -35,7 +35,7 @@ dependencies:
   - nbconvert-a11y==2023.12.6
   - nb2pdf==0.6.2
   - nbpdfexport==0.2.1
-  - jupyterlab-a11y-checker==0.1.1
+  - jupyterlab-a11y-checker==0.1.2
   # ###
   # The items below are from infra-requirements, however lab conflicts with the
   # alpha notebook.