Do not upgrade the primer's upper bound yet

Author: Pierre-Sassoulas

.github/workflows/primer_run_main.yaml

@@ -29,7 +29,7 @@ jobs:
     timeout-minutes: 45
     strategy:
       matrix:
-        python-version: ["3.8", "3.12-dev"]
+        python-version: ["3.8", "3.11"]
         batches: [4]
         batchIdx: [0, 1, 2, 3]
     steps: