fix: error not resulting in failure

Author: GeekyEggo

Diff for: dist/index.js

@@ -29419,7 +29419,7 @@ const utils_1 = __nccwpck_require__(1314);
             }
         }
         catch (err) {
-            core.error(`${err}`);
+            core.setFailed(err);
         }
     });
 })();

Diff for: src/index.ts

@@ -30,6 +30,6 @@ import { fail } from "./utils";
             );
         }
     } catch (err) {
-        core.error(`${err}`);
+        core.setFailed(<string | Error>err);
     }
 })();