Delete dynamic "network_rule_set"
All Submissions:
- [YES] Have you added an explanation of what your changes do and why you'd like us to include them?
- [NO] I have updated the documentation accordingly.
- [YES] My code follows the code style of this project.
Current Behavior or Linked Issues
Deleted dynamic "network_rule_set" from resource "azurerm_servicebus_namespace".
Does this introduce a breaking change?
- [NO]