SQLite tests against Python 3.10

Author: simonw

.github/workflows/test-sqlite-support.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         platform: [ubuntu-latest]
-        python-version: ["3.9"]
+        python-version: ["3.10"]
         sqlite-version: [
           "3.46",
           "3.23.1", # 2018-04-10, before UPSERT