`upgrade_unit` does match signature of abstract method

[carlcsaposs-canonical]

Mismatch between
upgrade_unit call in abstract_charm.py (type hinting is for abstract upgrade.py)

mysql-router-operator/src/abstract_charm.py

Lines 273 to 278 in b27eafe

	self._upgrade.upgrade_unit(
	event=event,
	workload_=workload_,
	tls=self._tls_certificate_saved,
	exporter_config=self._cos_exporter_config(event),
	)

upgrade.py abstract upgrade_unit

mysql-router-operator/src/upgrade.py

Lines 231 to 236 in b27eafe

	@abc.abstractmethod
	def upgrade_unit(self, *, workload_: workload.Workload, tls: bool) -> None:
	"""Upgrade this unit.
	Only applies to machine charm
	"""

machine_upgrade.py upgrade_unit

mysql-router-operator/src/machine_upgrade.py

Lines 161 to 168 in b27eafe

	def upgrade_unit(
	self,
	*,
	event,
	workload_: workload.Workload,
	tls: bool,
	exporter_config: "relations.cos.ExporterConfig",
	) -> None:

[github-actions]

https://warthogs.atlassian.net/browse/DPE-4219

[carlcsaposs-canonical]

@shayancanonical FYI; changed in #119

[shayancanonical]

resolved in #135