[BUG] Doc build can still succeed even though there are partial failures

[agdimech]

Describe the bug

It is possible for the docs build to succeed with partial failures as per: https://github.com/aws/aws-prototyping-sdk/actions/runs/2539820405

Expected Behavior

This should not be the case and the build should fail if any submodule fails to render docs.

Current Behavior

docs build succeeds even though there are partial failures.

Reproduction Steps

happens intermittently.

Possible Solution

N/A

Additional Information/Context

No response

PDK version used

0.2.8

What languages are you seeing this issue on?

Typescript, Java, Python

Environment details (OS name and version, etc.)

github