Merge branch 'coverage' into 'master'

Fix coverage badge

See merge request pycodegen/lbmpy!136

.gitlab-ci.yml

@@ -28,6 +28,7 @@ tests-and-coverage:
     - docker
     - cuda11
     - AVX
+  coverage: /Total coverage:\s\d+.\d+\%/
   artifacts:
     when: always
     paths: