### Apache Airflow version

2.7.2

### What happened

Sent request without dry_run parameter to dags/{dag_id}/updateTaskInstancesState and got a 500 error.

### What you think should happen instead

I should be able to send a request to update task instances state and get a valid response.

### How to reproduce

You can see this by commenting out line 215 in tests/api_connexion/schemas/test_task_instance_schema.py and running tests. This is a similar error to #34563.

### Operating System

Ubuntu 20.04

### Versions of Apache Airflow Providers

_No response_

### Deployment

Docker-Compose

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [X] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"max_tries": 0,
            "note": "added some notes",
            "operator": "EmptyOperator",
            "pid": 100,
            "pool": "default_pool",
            "pool_slots": 1,
            "priority_weight": 1,
            "queue": "default_queue",
            "queued_when": None,
            "sla_miss": {
                "dag_id": "TEST_DAG_ID",
                "description": None,
                "email_sent": False,
                "execution_date": "2020-01-01T00:00:00+00:00",
                "notification_sent": False,
                "task_id": "TEST_TASK_ID",
                "timestamp": None,
            },
            "start_date": "2020-01-02T00:00:00+00:00",
            "state": "running",
            "task_id": "TEST_TASK_ID",
            "try_number": 0,
            "unixname": getuser(),
            "dag_run_id": None,
            "rendered_fields": {"partitions": "data/ds=2022-02-17"},
            "trigger": None,
            "triggerer_job": None,
        }
        assert serialized_ti == expected_json
class TestClearTaskInstanceFormSchema: