feat: Use AnalysisBase v21.2.248 for Release 21 (!4)
- Use gitlab-registry.cern.ch/atlas/athena/analysisbase:21.2.248.
Please be advised that registry.cern.ch and registry-tn.cern.ch registries (Registry Service) will be unavailable next Tuesday, Feb 11th starting at 08:00h (Geneva time) for a short period of time. This may cause temporary disruptions to your workflows. Further info: OTG0154380