chore(deps): update go toolchain directive to v1.26.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
go (source)	toolchain	minor	1.23.1 → 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

v1.24.6

v1.24.5

v1.24.4

v1.24.3

v1.24.2

v1.24.1

v1.24.0

v1.23.12

v1.23.11

v1.23.10

v1.23.9

v1.23.8

v1.23.7

v1.23.6

v1.23.5

v1.23.4

v1.23.3

v1.23.2

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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: go get -d -t ./...
go: downloading go1.24.1 (linux/amd64)
go: download go1.24.1: golang.org/toolchain@v0.0.1-go1.24.1.linux-amd64: verifying module: checksum database disabled by GOSUMDB=off