chore(deps): update golang docker tag to v1.26.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
golang	final	minor	1.25 → 1.26.0

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[denisvmedia]

I'd probably change it to a point version to avoid version ambiguity. WDYT @alexandear @chavacava ?

[alexandear]

@denisvmedia This works well for us: FROM --platform=$BUILDPLATFORM golang:1.26 AS build (#1071, #1232, #1474).
I think we don't need to make any changes.

[denisvmedia]

@alexandear my point is that when you don't specify a point release, you don't know what exact go version you use during the build. It will work, but that brings ambiguity (one may have a cached version of a previous docker image and have a different result when building using our Dockerfile). Renovate bot is capable of updating point versions in Docker as well.

Reference: https://docs.docker.com/build/building/best-practices/#pin-base-image-versions

[alexandear]

@denisvmedia Got it. Let's update to the latest golang:1.26.0.

[renovate]

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