Bump docker/build-push-action from 6.13.0 to 6.15.0#20

dependabot[bot] wants to merge 1 commit intomainnipreps/fmripost-template:mainfrom

dependabot/github_actions/docker/build-push-action-6.15.0nipreps/fmripost-template:dependabot/github_actions/docker/build-push-action-6.15.0Copy head branch name to clipboard