Update axon.version to v5 (major)

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.axonframework:axon-test (source)	4.12.3 → 5.0.2
org.axonframework:axon-modelling (source)	4.12.3 → 5.0.2

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[renovate]

Renovate Ignore Notification

Because you closed this PR without merging, Renovate will ignore this update. You will not get PRs for any future 5.x releases. But if you manually upgrade to 5.x then Renovate will re-enable minor and patch updates automatically.

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