ci(release): introduce required environment changes to release on GitHub from GitLab

.gitlab-ci.yml

@@ -148,6 +148,7 @@ release:
     - python -m piptools sync release-requirements.txt
     - git config --global user.name "Bjoern Ludwig"
     - git config --global user.email "bjoern.ludwig@ptb.de"
-    - git remote set-url origin https://github.com/BjoernLudwigPTB/pytorch_gum_uncertainty_propagation.git
+    - export CI_PROJECT_NAMESPACE BjoernLudwigPTB
+    - export CI_PROJECT_NAME pytorch_gum_uncertainty_propagation
     - semantic-release publish
   environment: production