chore(deps): bump golang from 1.25 to 1.26

Bumps 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
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.25@sha256:cc737435e2742bd6da3b7d575623968683609a3d2e0695f9d85bee84071c08e6 AS builder
+FROM golang:1.26@sha256:c83e68f3ebb6943a2904fa66348867d108119890a2c6a2e6f07b38d0eb6c25c5 AS builder
 ARG TARGETOS
 ARG TARGETARCH