Update Bicep/arm-template examples to use latest api version

[UnwashedMeme]

There is a newer stable version of the api . The arm-template and bicep examples should reference that version.

[UnwashedMeme]

E.g. https://github.com/nginxinc/nginxaas-for-azure-snippets/blob/main/snippets/arm-templates/deployments/create-or-update/azdeploy.json#L64

[agazeley]

Should be addressed in this #27