Fix Prettier Feature DevContainer Link (#3196)

Fixes #3193

Author: rinehartj

.devcontainer/devcontainer.json

@@ -9,7 +9,7 @@
     "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": {}
   },
 
   // Optionally: run jekyll serve automatically on container entering using the Docker entrypoint