fix: Fixed tests so they also work on linux with a different shell.

Author: kevinwang5658

src/pty/background-pty.test.ts

@@ -48,7 +48,6 @@ describe('BackgroundPty tests', () => {
     expect(resultFailed).toMatchObject({
       status: 'error',
       exitCode: 1,
-      data: 'sjkdhsakjdhjkash not found' // This might change on different os or shells. Keep for now.
     })
 
     await pty.kill();

src/pty/sequential-pty.test.ts

@@ -36,7 +36,6 @@ describe('SequentialPty tests', () => {
     expect(resultFailed).toMatchObject({
       status: 'error',
       exitCode: 1,
-      data: 'sjkdhsakjdhjkash not found' // This might change on different os or shells. Keep for now.
     })
   });