Fix typos

Author: chrmarti

script-library/container-features/src/devcontainer-features.json

@@ -467,19 +467,19 @@
 				},
 				"password": {
 					"type": "string",
-					"proposal": ["vscode","codespaces","password"],
+					"proposals": ["vscode","codespaces","password"],
 					"default": "vscode",
 					"description": "Enter a password for desktop connections"
 				},
 				"webPort": {
 					"type": "string",
-					"proposal": ["6080"],
+					"proposals": ["6080"],
 					"default": "6080",
 					"description": "Enter a port for the desktop web client"
 				},
 				"vncPort": {
 					"type": "string",
-					"proposal": ["5901"],
+					"proposals": ["5901"],
 					"default": "5901",
 					"description": "Enter a port for the desktop VNC server"
 				}