Set click==8.0.2 for style check workflow

dask/distributed#6013
Signed-off-by: Beat Buesser <[email protected]>

Author: Beat Buesser

.github/workflows/ci-style-checks.yml

@@ -44,6 +44,7 @@ jobs:
           python -m pip install types-six
           python -m pip install types-PyYAML
           python3 -m pip install types-setuptools
+          pip install click==8.0.2
           pip list
       - name: pycodestyle
         run: pycodestyle --ignore=C0330,C0415,E203,E231,W503 --max-line-length=120 art