Bump golang from 1.26.1 to 1.26.2 in /dockerfiles/test-cfssl

Bumps golang from 1.26.1 to 1.26.2.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.26.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

dockerfiles/test-cfssl/Dockerfile

@@ -11,7 +11,7 @@ FROM cfssl/cfssl:v1.6.5 as cfssl
 
 # We just need any basic unix with bash, but we can pick the same
 # base image that they use, just in case they did any dynamic linking.
-FROM golang:1.26.1
+FROM golang:1.26.2
 
 # Thier Docerfile https://github.com/cloudflare/cfssl/blob/master/Dockerfile
 # calls their Makefile https://github.com/cloudflare/cfssl/blob/master/Makefile