Update go toolchain directive to v1.26.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go (source)	toolchain	minor	1.24.6 → 1.26.4

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Release Notes

golang/go (go)

v1.26.4

v1.26.3

v1.26.2

v1.26.1

v1.26.0

v1.25.11

v1.25.10

v1.25.9

v1.25.8

v1.25.7

v1.25.6

v1.25.5

v1.25.4

v1.25.3

v1.25.2

v1.25.1

v1.25.0

v1.24.13

v1.24.12

v1.24.11

v1.24.10

v1.24.9

v1.24.8

v1.24.7

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Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: install-tool golang 1.25.0