vapoursynth: Use Python 3.10

Author: cid-chan

.github/workflows/linux.yml

@@ -44,10 +44,10 @@ jobs:
       matrix:
         vs: ["58", "59"]
         include:
-        - vs: "57"
-          python: "3.9"
         - vs: "58"
           python: "3.10"
+        - vs: "59"
+          python: "3.10"
     steps:
     - uses: actions/checkout@v2.4.0
     - name: Install Python ${{ matrix.python }}