Specify the versions that previously worked

Author: AlexanderWells-diamond

.github/workflows/code.yml

@@ -189,6 +189,7 @@ jobs:
         run: |
           pip install git+https://github.com/epics-base/p4p.git git+https://github.com/epics-base/pvxs.git git+https://github.com/epics-base/epicscorelibs.git
           pip install git+https://github.com/DiamondLightSource/aioca git+https://github.com/DiamondLightSource/cothread
+          pip install Pygments==2.18.0 pytest-asyncio==0.25.0 setuptools==75.6.0
           pip install -e .[dev]
           pip freeze