Update devcontainer.json

fix the prettier package in devcontainers.

Author: animesh-garg

.devcontainer/devcontainer.json

@@ -9,7 +9,8 @@
     "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
       "packages": "build-essential,imagemagick,inotify-tools,jupyter-nbconvert,procps,ruby-full,zlib1g-dev"
     },
-    "ghcr.io/devcontainers-contrib/features/prettier:1": {}
+    "ghcr.io/devcontainers-extra/features/prettier:1.0.2": {}
+    // "ghcr.io/devcontainers-contrib/features/prettier:1": {}
   },
 
   // Optionally: run jekyll serve automatically on container entering using the Docker entrypoint