Update vscode.d.ts for clearSessionPreference (microsoft#180979)

Fixes microsoft#180860

Author: TylerLeonhardt

src/vscode-dts/vscode.d.ts

@@ -15653,12 +15653,19 @@ declare module 'vscode' {
 	 */
 	export interface AuthenticationGetSessionOptions {
 		/**
-		 * Whether the existing user session preference should be cleared.
+		 * Whether the existing session preference should be cleared.
 		 *
 		 * For authentication providers that support being signed into multiple accounts at once, the user will be
 		 * prompted to select an account to use when {@link authentication.getSession getSession} is called. This preference
 		 * is remembered until {@link authentication.getSession getSession} is called with this flag.
 		 *
+		 * Note:
+		 * The preference is extension specific. So if one extension calls {@link authentication.getSession getSession}, it will not
+		 * affect the session preference for another extension calling {@link authentication.getSession getSession}. Additionally,
+		 * the preference is set for the current workspace and also globally. This means that new workspaces will use the "global"
+		 * value at first and then when this flag is provided, a new value can be set for that workspace. This also means
+		 * that pre-existing workspaces will not lose their preference if a new workspace sets this flag.
+		 *
 		 * Defaults to false.
 		 */
 		clearSessionPreference?: boolean;