[release-1.9] Update go version to 1.20.9#1419

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k8s-infra-cherrypick-robot wants to merge 1 commit intokubernetes-sigs:release-1.9from

k8s-infra-cherrypick-robot:cherry-pick-1412-to-release-1.9

Commits on Oct 16, 2023

Update go version to 1.20.9

dannawang0221
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k8s-infra-cherrypick-robot
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