Documentation build does not show errors when it fails

[jphickey]

Checklist (Please check before submitting)

• I reviewed the Contributing Guide.
• I reviewed the cFS README.md file to see if the feature is in the major future work.
• I performed a cursory search to see if the feature request is relevant, not redundant, nor in conflict with other tickets.

Is your feature request related to a problem? Please describe.
When using the workflow in build-deploy-doc.yml, if the "Build Document" step fails, then the job stops there. However, the stderr output was redirected to a file, which is not uploaded as an artifact until the next step. Therefore, it is not possible to see what actually failed by looking at the log, because the information is in a file that is never displayed nor uploaded.

Describe the solution you'd like
Show the stderr output on the console so it can be seen even if artifacts are not uploaded.

Additional context
Adjusting the redirection should solve this.

Requester Info
Joseph Hickey, Vantage Systems, Inc.