Fixed a library issue where the value could not be empty

.docs/.openapi/api.base.yaml

.docs/api/analyse-service.md

.docs/api/data-service.md

.docs/api/metadata-service.md

.docs/api/search-service.md

.docs/api/ui.md

.docs/changelog.md

.docs/index.md

.docs/installation.md

.docs/kubernetes.md

.gitlab-ci.yml

.gitlab/gen-badge.sh

Makefile

dbrepo-analyse-service/Pipfile

dbrepo-analyse-service/Pipfile.lock

dbrepo-analyse-service/app.py

dbrepo-analyse-service/lib/dbrepo-1.9.0.tar.gz

dbrepo-analyse-service/lib/dbrepo-1.9.1-py3-none-any.whl

dbrepo-analyse-service/lib/dbrepo-1.9.1.tar.gz

dbrepo-auth-service/init/Pipfile