Github CI: Whitespace fix

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
         -
             uses: actions/setup-python@v1
             with:
-                python-version: '3.x' 
+                python-version: '3.x'
         -   name: "Main Script"
             run: |
                 curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/prepare-and-run-flake8.sh