chore(deps): update golang docker tag to v1.26.6 (#612)

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| docker     | golang  | 1.26.5 | 1.26.6 |

Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>
Co-authored-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=${BUILDPLATFORM} golang:1.26.5-alpine3.23@sha256:622e56dbc11a8cfe87cafa2331e9a201877271cbff918af53d3be315f3da88cc AS builder
+FROM --platform=${BUILDPLATFORM} golang:1.26.6-alpine3.23@sha256:e57c41c1d5864341031181b0db34b9a537bb5773eb6428e4e5bdaea0f9135406 AS builder
 
 # Dependencies required to run the race detector
 RUN \