Update devcontainer and Learnpack audit versions

Author: ehiber

.github/workflows/learnpack-audit.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [20.x]
+        node-version: [22.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps: