fixed isort in run tests to same line-length as used in pre-commit-co…

…nfig to avoid reoccuring conflicts in profile, #48, see also #60.

.github/workflows/run-tests.yaml

@@ -62,7 +62,7 @@ jobs:
       - name: Run black
         run: poetry run black . --check
       - name: Run isort
-        run: poetry run isort . --check-only --profile black
+        run: poetry run isort . --check-only --profile black --line-length=80
       - name: Run flake8
         run: poetry run flake8 src --output-file=flake8_report.txt
       - name: Run pylint