Log specific error even if it is not an Error

dist/index.js

@@ -52162,7 +52162,7 @@ async function run() {
             coreExports.setFailed(error.message);
         }
         else {
-            coreExports.setFailed('An unexpected error occurred');
+            coreExports.setFailed(`An unexpected error occurred: ${JSON.stringify(error)}`);
         }
     }
 }