chore(deps): bump golang from 1.25 to 1.26 in the docker group

Bumps the docker group with 1 update: golang.


Updates `golang` from 1.25 to 1.26

---
updated-dependencies:
- dependency-name: golang
  dependency-version: '1.26'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.25 AS builder
+FROM golang:1.26 AS builder
 ARG TARGETOS
 ARG TARGETARCH