- fix: apt update required before any package installations

.gitlab-ci.yml

@@ -115,5 +115,6 @@ test-install-debian-job:
   tags:
     - "docker"
   script:
+    - apt update
     - apt install -y ./verapdf*.deb
     - ${INSTALL_PATH_VERAPDF_DEB}/verapdf --version | grep "${VERAPDF_VERSION}"