Bump golang from ef61a20 to cefea7f in /tests (#2467)

Bumps golang from `ef61a20` to `cefea7f`.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/Dockerfile

@@ -1,5 +1,5 @@
 # The Dockerfile's resulting image is purpose-built for executing Jaeger Operator e2e tests within the OpenShift release (https://github.com/openshift/release) using Prow CI.
-FROM golang@sha256:ef61a20960397f4d44b0e729298bf02327ca94f1519239ddc6d91689615b1367
+FROM golang@sha256:cefea7fa6852b85f0042ce9d4b883c7e0b03b2bcb25972372d59e4f7c4367c04
 
 # Set the user to root
 USER root