Typo: docs/examples/rewrite/README.md

[chainhelen]

What this PR does / why we need it:
This PR fix typo about version in docs/examples/rewrite/README.md.

Which issue this PR fixes
fixes #3174

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[aledbf]

@chainhelen please sign the CLA

[aledbf]

/lgtm
/approve

[aledbf]

@chainhelen thanks!

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, chainhelen

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[chainhelen]

@aledbf Thank you for reminding me. Done.