Merge pull request #260 from ISISComputingGroup/jack_idiot

actually run the script rather than just print the python version

Author: rerpha

.github/workflows/create-release-branches.yml

@@ -50,4 +50,4 @@ jobs:
         with:
           python-version: '3.12'
       - run: python -m pip install -r release_scripts/requirements.txt
-      - run: python --version ${{github.event.inputs.version}}
+      - run: python release_scripts/branches.py --version ${{github.event.inputs.version}}