move vscode.env.uriScheme to stable

src/vs/vscode.d.ts

@@ -5973,6 +5973,11 @@ declare module 'vscode' {
 		 */
 		export const appRoot: string;
 
+		/**
+		 * The custom uri scheme the editor registers to in the operating system.
+		 */
+		export const uriScheme: string;
+
 		/**
 		 * Represents the preferred user-language, like `de-CH`, `fr`, or `en-US`.
 		 */

src/vs/vscode.proposed.d.ts

@@ -616,11 +616,6 @@ declare module 'vscode' {
 		 * An [event](#Event) that fires when the log level has changed.
 		 */
 		export const onDidChangeLogLevel: Event<LogLevel>;
-
-		/**
-		 * The custom uri scheme the editor registers to in the operating system, like 'vscode', 'vscode-insiders'.
-		 */
-		export const uriScheme: string;
 	}
 
 	//#endregion