Sprints with small/capital cannot be differentiated

[Alexander-Hjelm]

If two sprints exist on the same location in the tree, with the only difference being small/capital letters, the tool will give the following error:

Classification node name Bistro februarisprint is already in use by a different child of parent classification node 5eece9cd-e625-4276-952b-4b23e85b7121. Choose a different name and try again.

ADO does not differentiate between big/small letters, but Jira does.

Ideally we would print a more helpful error message.