fix typo in GA test configure yml

Author: marian-code

.github/workflows/all-lints.yml

@@ -10,7 +10,7 @@ jobs:
     - uses: actions/checkout@v1
     - uses: marian-code/pyaction@master
       with:
-        python-root-list: "./tests/*.py ./tests/subtests/*.py"
+        python-root-list: "./tests/*.py ./tests/subtest/*.py"
         use-black: true
         use-isort: true
         use-mypy: true