Update dependency golang to v1.20.6

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
golang (source)	patch	1.20.5 -> 1.20.6

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Release Notes

golang/go (golang)

### [`v1.20.6`](https://togithub.com/golang/go/compare/go1.20.5...go1.20.6)

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