Bump golang from 5f5d61d to 76aadd9 in /tests (#2445)

Bumps golang from `5f5d61d` to `76aadd9`.

---
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@sha256:5f5d61dcb58900bc57b230431b6367c900f9982b583adcabf9fa93fd0aa5544a
+FROM golang@sha256:76aadd914a29a2ee7a6b0f3389bb2fdb87727291d688e1d972abe6c0fa6f2ee0
 
 # Set the user to root
 USER root