Declare transitive dependency on Az.KeyVault 3.4.1

[heaths]

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[heaths]

I'm off on vacation till 11/29. Could one of you shepherd this through? Great for padding your GitHub stats. 😉

[azure-sdk]

The following pipelines have been queued for testing:
java - template
java - template - tests
js - template
net - template
net - template - tests
python - template
python - template - tests
You can sign off on the approval gate to test the release stage of each pipeline.
See eng/common workflow

[weshaggard]

@heaths thanks for the fix I will shepherd it through.

[ghost]

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