chore: update devcontainer features

Author: katallaxie

.devcontainer/devcontainer.json

@@ -14,9 +14,7 @@
     "ghcr.io/devcontainers/features/go:1": {},
     "ghcr.io/zeiss/devcontainer-features/air:1": {},
     "ghcr.io/devcontainers/features/github-cli:1": {},
-    "ghcr.io/ZEISS/devcontainer-features/ghc:1": {
-      "version": "0.1.1"
-    }
+    "ghcr.io/ZEISS/devcontainer-features/ghc:1": {}
   },
   "customizations": {
     "vscode": {