Fix mypy issues in example_twitter_dag

[jedcunningham]

This fixes mypy issues in the example_twitter_dag:

mypy airflow/providers/apache/hive/example_dags/example_twitter_dag.py 
airflow/providers/apache/hive/example_dags/example_twitter_dag.py:88: error: Unsupported left operand type for >> ("Task[Callable[[], Any]]")  [operator]
        fetch_tweets >> clean_tweets >> analyze_tweets
        ^
airflow/providers/apache/hive/example_dags/example_twitter_dag.py:127: error: Unsupported operand types for >> ("Task[Callable[[], Any]]" and "BashOperator") 
[operator]
            analyze_tweets >> load_to_hdfs >> load_to_hive >> hive_to_mysql
            ^
airflow/providers/apache/hive/example_dags/example_twitter_dag.py:147: error: Unsupported operand types for >> ("Task[Callable[[], Any]]" and "BashOperator") 
[operator]
            analyze_tweets >> load_to_hdfs >> load_to_hive >> hive_to_mysql
            ^
Found 3 errors in 1 file (checked 1 source file)

[github-actions]

The PR is likely OK to be merged with just subset of tests for default Python and Database versions without running the full matrix of tests, because it does not modify the core of Airflow. If the committers decide that the full tests matrix is needed, they will add the label 'full tests needed'. Then you should rebase to the latest main or amend the last commit of the PR, and push it with --force-with-lease.