Update encryptInTransit examples

[Phaow]

Is this a bug fix or adding new feature?

• Doc enhancement

What is this PR about? / Why do we need it?

• The tls under mountOptions is deprecated with this driver since tls is enabled by default(Add encryptInTransit volume attribute #205). Remove the deprecated tls mountOption from example use cases.

# The warnings in csi diver node logs
$ kubectl logs -l app=aws-efs-csi-driver-node -c csi-driver --tail=-1|grep -E '^W'
W0704 06:23:49.397931       1 node.go:176] Use of 'tls' under mountOptions is deprecated with this driver since tls is enabled by default. To disable it, set encrypt in transit in the volumeContext, e.g. 'encryptInTransit: true'

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[k8s-ci-robot]

Hi @Phaow. Thanks for your PR.

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[Phaow]

Hi @dankova22 , could you help take a look when you get a chance? Thank you!
/assign @dankova22

[Phaow]

/ok-to-test

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@Phaow: Cannot trigger testing until a trusted user reviews the PR and leaves an /ok-to-test message.

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/ok-to-test

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[Phaow]

/ok-to-test