Update actions/setup-go action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-go	action	major	v3 -> v4

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Release Notes

actions/setup-go (actions/setup-go)

v4

Compare Source

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[roobre]

Seems like v4 enables caching by default: https://github.com/actions/setup-go#v4

LGTM