[charm] Update dependency ops to ^2.11.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
ops (changelog)	^2.10.0 -> ^2.11.0

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Release Notes

canonical/operator (ops)

v2.11.0

Compare Source

• StopEvent, RemoveEvent, and all LifeCycleEvents are no longer deferrable, and will raise a RuntimeError if defer() is called on the event object.
• The remote app name (and its databag) is now consistently available in relation-broken events.
• Added ActionEvent.id, exposing the JUJU_ACTION_UUID environment variable.
• Added support for creating pebble.Plan objects by passing in a pebble.PlanDict, the
  ability to compare two Plan objects with ==, and the ability to create an empty Plan with Plan().

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