ci: Fix broken yaml

Author: telespazio-tim

.github/workflows/ubuntu.yml

@@ -48,7 +48,6 @@ jobs:
         python -m pip install --upgrade pip
         pip install setuptools>=77.0
         pip install -e .
-      shell: bash -l {0}
 
     - name: Install dev dependencies for testing
       shell: bash -l {0}
@@ -58,11 +57,9 @@ jobs:
           pip install -r requirements_dev.txt
           # conda install -n karios -c conda-forge --file requirements_dev.txt
         fi
-      shell: bash -l {0}
 
     - name: Run tests
       shell: bash -l {0}
       continue-on-error: true
       run: |
         python -m pytest tests/ -v
-      shell: bash -l {0}