Fix Codespaces machine type requirements

Co-authored-by: leestott <2511341+leestott@users.noreply.github.com>

.devcontainer/devcontainer.json

@@ -2,9 +2,7 @@
   "name": "Miniconda (Python 3)",
   "image": "mcr.microsoft.com/devcontainers/miniconda",
   "hostRequirements": { 
-    "cpus": 4, 
-    "memory": "8gb", 
-    "storage": "50gb"
+    "cpus": 2
   },
   "customizations": {
     "vscode": {