Add default namespace default to ServiceAccount definition in example yaml

[abctaylor]

This is to catch the case where users find-replace the default namespace with another namespace (say, goldpinger but don't change it for the ServiceAccount definition.

Issue number of the reported bug or feature request: #

Describe your changes
Added a namespace key under metadata with corresponding namespace (default) used elsewhere in the sample yaml.

Testing performed
Tested on prem, k8s 1.27 with kubectl apply -f file.yaml.

Additional context
N/A.

[skamboj]

Thank you so much for your contribution. This looks good. We do need a DCO before we can approve this - please see this link: https://github.com/bloomberg/goldpinger/blob/master/CONTRIBUTING.md#contribution-licensing for details.

[abctaylor]

@skamboj did I not already do it in my first commit? LMK if something is wrong syntactically:

[skamboj]

@skamboj did I not already do it in my first commit? LMK if something is wrong syntactically:

Sorry the reason it failed is given here: https://github.com/bloomberg/goldpinger/runs/23516585421

Commit sha: [bda1235](https://github.com/bloomberg/goldpinger/pull/142/commits/bda1235c406be80ee1c3fa6189b6d3c8dd193889), Author: ABC Taylor, Committer: ABC Taylor; Expected "ABC Taylor [abc@abctaylor.com](mailto:abc@abctaylor.com)", but got "Andrew Taylor [abc@abctaylor.com](mailto:abc@abctaylor.com)".

I think it was expecting ABC Taylor and got Andrew Taylor instead.

[abctaylor]

@skamboj I have now --amended the message.

[skamboj]

LGTM,