Fix orekit data repo URL

• Only after merge of orekit/orekit-data!4 (merged) : this merge request replaces the URL https://gitlab.orekit.org/yzokras/orekit-data.git in the conda environments by https://gitlab.orekit.org/orekit/orekit-data.git

• Once !5 (merged) is merged, rebase this branch onto the master

.devcontainer/dev-conda-environment.yaml

@@ -25,4 +25,4 @@ dependencies:
 - flake8-use-pathlib
 - flake8-noqa
 - pip:
-    - "git+https://gitlab.orekit.org/yzokras/orekit-data.git"
+    - "git+https://gitlab.orekit.org/orekit/orekit-data.git"