Update reference usage example and fix broken links in configuring a resource doc

[turkenf]

Description of your changes

In this PR, the example regarding manual reference addition has been updated with the TerraformName field and broken links have been corrected.

I have:

• [x] Read and followed Upjet's contribution process.
• [x] Run make reviewable to ensure this PR is ready for review.
• [ ] Added backport release-x.y labels to auto-backport this PR if necessary.