add v2 deprecation warning

lib/autobuild-action.js

@@ -53,6 +53,7 @@ async function run() {
         }
         const gitHubVersion = await (0, api_client_1.getGitHubVersion)();
         (0, util_1.checkGitHubVersionInRange)(gitHubVersion, logger);
+        (0, util_1.checkActionVersion)((0, actions_util_1.getActionVersion)(), gitHubVersion);
         const config = await configUtils.getConfig((0, actions_util_1.getTemporaryDirectory)(), logger);
         if (config === undefined) {
             throw new Error("Config file could not be found at expected location. Has the 'init' action been called?");