DevContainer build woes: Microsoft has its own version number convention

.devcontainer/devcontainer.json

@@ -11,7 +11,7 @@
       // Update 'VARIANT' to pick a Python version: 3, 3.10, 3.9, 3.8, 3.7, 3.6
       // Append -bullseye or -buster to pin to an OS version.
       // Use -bullseye variants on local on arm64/Apple Silicon.
-      "VARIANT": "3.11.10-bullseye"
+      "VARIANT": "3.11-bullseye"
     }
   },