Update nf_core/utils.py

Co-authored-by: Matthias Hörtenhuber <mashehu@users.noreply.github.com>

nf_core/utils.py

@@ -733,7 +733,7 @@ def get_tag_date(tag_date):
                 # Obtain common builds from Docker and Singularity images
                 common_keys = list(all_docker.keys() & all_singularity.keys())
                 current_date = None
-                docker_image_name = docker_image["image_name"] if docker_image is not None else None
+                docker_image_name = docker_image["image_name"].lstrip("quay.io/") if docker_image is not None else None
                 for k in common_keys:
                     # Get the most recent common image
                     date = max(all_docker[k]["date"], all_docker[k]["date"])