remove pandas version fix in github actions for unitttests (#48)

Author: c-w-feldmann

.github/workflows/linting.yml

@@ -222,7 +222,6 @@ jobs:
       - name: Install package
         run: |
           python -m pip install --upgrade pip
-          pip install "pandas<2.2.0"
           pip install .[notebooks]
       - name: Run unit-tests for notebooks
         run: |