Update comment

Author: bamurtaugh

.devcontainer/devcontainer.json

@@ -42,6 +42,7 @@
 // Use 'postCreateCommand' to run commands after the container is created.
 "postCreateCommand": "pip3 install -r requirements.txt",
 
+// Use 'portsAttributes' to set default properties for specific forwarded ports.
 "portsAttributes": {
 "9000": {
 "label": "Hello Remote World",