gitlab-ci: create the public key for the upload key

.gitlab/upload.yml

@@ -14,4 +14,5 @@
         - ls build/
         - dnf install -y --setopt=install_weak_deps=False rsync openssh-clients
         - chmod 400 $RSYNC_BINARY_KEY
+        - ssh-keygen -y -f $RSYNC_BINARY_KEY > $RSYNC_BINARY_KEY.pub
         - rsync -tv --recursive -e "ssh -i $RSYNC_BINARY_KEY -o StrictHostKeyChecking=no" build/ kitware@public.kitware.com:$RSYNC_DESTINATION/