Revert "Stop running CI all the time and having it fail."

This reverts commit f37b514.

Author: markstory

.github/workflows/ci.yml

@@ -3,16 +3,16 @@ name: CI
 on:
   pull_request:
   push:
+  schedule:
+    - cron: '0 0/2 * * *'
 
 jobs:
   build:
     if: endsWith(github.head_ref || github.ref_name, '.changes') == false
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        # Builds are failing with py3.9+ because sphinx templates are different.
-        # python: ['3.7', '3.8', '3.9', '3.10', '3.11']
-        python: ['3.7', '3.8']
+        python: ['3.7', '3.8', '3.9', '3.10', '3.11']
       fail-fast: false
 
     permissions: