Use a released version of env-cache again

setup.py

@@ -62,7 +62,7 @@ install_requires = [
         "docutils==0.20.1",
         "dynaconf==3.2.4",
         "dynflatfield==1.1.0",
-        "env_cache @ git+https://github.com/European-XFEL/env-cache.git@69e2117025b3a729d06d7c7f70d6c10a571353dc",  # TODO: release
+        "env_cache==0.2",
         "extra_data==1.16.0",
         "extra_geom==1.11.0",
         "gitpython==3.1.42",