Bump golang from 1.25.5 to 1.25.6 in /deployments/devel

Bumps golang from 1.25.5 to 1.25.6.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.25.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

deployments/devel/Dockerfile

@@ -14,4 +14,4 @@
 
 # This Dockerfile is also used to define the golang version used in this project
 # This allows dependabot to manage this version in addition to other images.
-FROM golang:1.25.5
+FROM golang:1.25.6