Fix to LoadBalancer snippet

[matt-theguyw1cat]

Existing gives error: warning: cannot overwrite table with non table for... on helm update and doesn't align with the current parameter reference for webserver: https://airflow.apache.org/docs/helm-chart/stable/parameters-ref.html#webserver

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[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache Airflow community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst)
Here are some useful points:

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[boring-cyborg]

Awesome work, congrats on your first merged pull request!