build(deps): bump library/golang from 1.25-alpine to 1.26-alpine

Bumps library/golang from 1.25-alpine to 1.26-alpine.

---
updated-dependencies:
- dependency-name: library/golang
  dependency-version: 1.26-alpine
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -1,4 +1,4 @@
-FROM docker.io/library/golang:1.25-alpine AS builder
+FROM docker.io/library/golang:1.26-alpine AS builder
 
 RUN mkdir /src
 WORKDIR /src