Update Sidecar Release Process documentation syntax for release-notes tool

[pwschuurman]

What type of PR is this?
/kind documentation

What this PR does / why we need it: Update syntax for documentation reference the release-notes tool

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: pwschuurman
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[k8s-ci-robot]

Hi @pwschuurman. Thanks for your PR.

I'm waiting for a kubernetes-csi member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[xing-yang]

For changes in release-tools, please submit a PR in this repo: https://github.com/kubernetes-csi/csi-release-tools
Once it's merged, it can be imported to all sidecar repos.
Here's an example: #641

[pwschuurman]

Ok, made a PR there: kubernetes-csi/csi-release-tools#188

Will close this out.