fixed syntax

.github/workflows/test.yml

@@ -8,9 +8,14 @@ jobs:
       matrix:
         python: ["3.7", "3.8", "3.9", "3.10", "3.11"]
         os: [ubuntu-latest, windows-latest]
-        exclude: # just test lowest and highest python version on windows
+        exclude:
+          # just test lowest and highest python version on windows
           - os: windows-latest
-            python-version: ["3.8", "3.9", "3.10"]
+            python-version: "3.8"
+          - os: windows-latest
+            python-version: "3.9"
+          - os: windows-latest
+            python-version: "3.10"
       fail-fast: false
     runs-on: ${{ matrix.os }}
     timeout-minutes: 15