### Apache Airflow version

2.5.1

### What happened

/calendar page give a problem, here is the capture



![屏幕截图 2023-01-30 093116](https://user-images.githubusercontent.com/19165258/215369479-9fc7de5c-f190-460c-9cf7-9ab27d8ac355.png)


### What you think should happen instead

_No response_

### How to reproduce

_No response_

### Operating System

Ubuntu 22.04.1 LTS

### Versions of Apache Airflow Providers

Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:        22.04
Codename:       jammy

### Deployment

Other

### Deployment details


Distributor ID: Ubuntu
Description:    Ubuntu 22.04.1 LTS
Release:        22.04
Codename:       jammy

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] 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)

"""Triggers DAG Run."""
        dag_id = request.values.get("dag_id")
        run_id = request.values.get("run_id")
        origin = get_safe_url(request.values.get("origin"))
        unpause = request.values.get("unpause")
        request_conf = request.values.get("conf")
        request_execution_date = request.values.get("execution_date", default=timezone.utcnow().isoformat())
        is_dag_run_conf_overrides_params = conf.getboolean("core", "dag_run_conf_overrides_params")
        dag = get_airflow_app().dag_bag.get_dag(dag_id)
        dag_orm: DagModel = session.query(DagModel).filter(DagModel.dag_id == dag_id).first()
        
        form_fields = {}
        for k, v in dag.params.items():
            form_fields[k] = v.dump()
            
            if "schema" not in form_fields[k]:
                form_fields[k]["schema"] = {}
            if "type" not in form_fields[k]["schema"]:
                if isinstance(form_fields[k]["value"], bool):
                    form_fields[k]["schema"]["type"] = "boolean"
                elif isinstance(form_fields[k]["value"], int):
                    form_fields[k]["schema"]["type"] = ["integer", "null"]
                elif isinstance(form_fields[k]["value"], list):
                    form_fields[k]["schema"]["type"] = ["array", "null"]
                elif isinstance(form_fields[k]["value"], dict):
                    form_fields[k]["schema"]["type"] = ["object", "null"]
            
            if (
                "description_html" in form_fields[k]["schema"]