build: use Debian 12 in Python base images

Author: uniqueg

.github/workflows/checks.yml

@@ -19,9 +19,9 @@ jobs:
       fail-fast: true
       matrix:
         py-version-img: [
-          ["3.9", "3.9-slim-bullseye"],
-          ["3.10", "3.10-slim-bullseye"],
-          ["3.11", "3.11-slim-bullseye"]
+          ["3.9", "3.9-slim-bookworm"],
+          ["3.10", "3.10-slim-bookworm"],
+          ["3.11", "3.11-slim-bookworm"]
         ]
         mongodb-version: ["4.4", "5.0", "6.0", "7.0"]
         mongodb-port: [12345]
@@ -81,9 +81,9 @@ jobs:
       fail-fast: true
       matrix:
         py-version-img-tag: [
-          ["3.9", "3.9-slim-bullseye", ""],
-          ["3.10", "3.10-slim-bullseye", ""],
-          ["3.11", "3.11-slim-bullseye", "latest"],
+          ["3.9", "3.9-slim-bookworm", ""],
+          ["3.10", "3.10-slim-bookworm", ""],
+          ["3.11", "3.11-slim-bookworm", "latest"],
         ]
 
     steps: