moved the breaking changes section to under v37.0.0

[yliaog]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

moved the breaking changes section to under v37.0.0

Which issue(s) this PR fixes:

Fixes #
#2726

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[yliaog]

/assign @yurnov

[kubernetes-prow]

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In response to this:

/assign @yurnov

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[yliaog]

/assign @roycaihw

[roycaihw]

/lgtm
/approve

[kubernetes-prow]

[APPROVALNOTIFIER] This PR is APPROVED

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