Update src/main.ts

Co-authored-by: Marais Rossouw <me@marais.co>

src/main.ts

@@ -94,7 +94,7 @@ export async function run(): Promise<void> {
     if (error instanceof Error) {
       core.setFailed(error.message)
     } else {
-      core.setFailed(`An unexpected error occurred: ${JSON.stringify(error)}`)
+      core.setFailed(`An unexpected error occurred: ${JSON.stringify(error, null, 2)}`)
     }
 
     // Force exit to prevent hanging on open connections