Update pytest command in GitLab CI configuration

The pytest command in the .gitlab-ci.yml file has been updated to remove redundant output. Previously, the command specified both `term` and `xml:coverage.xml` for `--cov-report`, but now it only includes `xml:coverage.xml` to simplify the report generation.

.gitlab-ci.yml

@@ -5,7 +5,7 @@ pytest:
     - apt-get install -y python3-dev python3-pip graphviz graphviz-dev
     - pip install pytest
     - pip install .
-    - pytest --cov --cov-report term --cov-report xml:coverage.xml
+    - pytest --cov --cov-report xml:coverage.xml
   coverage: '/(?i)total.*? (100(?:\.0+)?\%|[1-9]?\d(?:\.\d+)?\%)$/'
   artifacts:
     reports: