chore(deps): update actions/setup-go action to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-go	action	major	v5 -> v6

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Release Notes

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

v6

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1. .github/workflows/test.yml:15

• Draft comment:
  Updated actions/setup-go to v6. Please ensure that any new behaviors or input requirements introduced in v6 are addressed, as per its release notes.
• Reason this comment was not posted:
  Confidence changes required: 33% <= threshold 50% None

2. .github/workflows/test.yml:29

• Draft comment:
  Updated actions/setup-go in the go-mod-tidy job. Verify that go-version (1.24.x) is properly supported and no additional configuration is needed in v6.
• Reason this comment was not posted:
  Confidence changes required: 33% <= threshold 50% None

Workflow ID: wflow_a6fdEGcWylBn6QXw

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