Maintenance of GH Workflows: used cosign-installer version is broken

[jan-abel-inwt]

We need to update the cosign-installer workflow in all apps. The currently used version is broken and need to be updated. I have already tested this sucessfully in the MapR Repository.

• [x] base-image
• [x] bmsc-app
• [x] bpred
• [x] iso-app
• [x] iso-data
• [x] mapr
• [x] osteo-bior
• [x] plotr
• [x] resources