Fix task instance url in webserver utils (#18418)
Fix task instance url in webserver utils (#18418)

execution_date was omitted when generating the task instance url.
This PR fixes it
bolkedebruin/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,lyft/incubator-airflow,apache/incubator-airflow,nathanielvarona/airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,apache/airflow,apache/airflow,lyft/incubator-airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,cfei18/incubator-airflow,apache/airflow,apache/incubator-airflow,lyft/incubator-airflow,apache/incubator-airflow,mistercrunch/airflow,danielvdende/incubator-airflow,cfei18/incubator-airflow,mistercrunch/airflow,mistercrunch/airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,nathanielvarona/airflow,apache/airflow,cfei18/incubator-airflow,apache/incubator-airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,mistercrunch/airflow,bolkedebruin/airflow,cfei18/incubator-airflow,cfei18/incubator-airflow,bolkedebruin/airflow,apache/airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,apache/airflow,cfei18/incubator-airflow