Fix Git URL

cookiecutter.json

@@ -6,7 +6,7 @@
     "version": "0.1.0",
     "description": "The {{ cookiecutter.project_name }} project",
     "gitlab_username": "{{cookiecutter.email.split('@')[0]}}",
-    "gitlab_repo_path": "https://git.km3net.de/{{ cookiecutter.gitlab_username + '/' + cookiecutter.project_slug }}.git",
+    "gitlab_repo_path": "https://git.km3net.de/{{ cookiecutter.gitlab_username + '/' + cookiecutter.project_slug }}",
     "_extensions": ["jinja2_time.TimeExtension"],
     "_test": "{% print('hello') %}"
 }