Use Docker dev image with Python 3.14 (Conda env) support

Author: popescu-v

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ on:
         default: 11.0.0
         description: Git Tag/Branch/Commit for the khiops-samples Repo
       image-tag:
-        default: 11.0.0-b.0.0
+        default: 11.0.0-b.0.465
         description: Development Docker Image Tag
       khiops-desktop-revision:
         default: 11.0.0-b.0