fix: ReadMe Gen - Fixed incorrect section reference if non-parent module

[AlexanderSehr]

Description

Currently, all child-module readme files would reference the # Usage Examples section, even though only a subset of modules (most notably parent modules, but also multi-scope modules) actual have this section.

The output is now altered accordingly.

Example of the bug:

The changes initially visible in this PR show the state after

• Running on the authorization/role-assignment module folder with the -recurse flag => No change
• Running on the key-vault/vault module folder with the -recurse flag => Change only in child modules

Pipeline Reference

Pipeline

Type of Change

• Azure Verified Module updates:
  • Bugfix containing backwards-compatible bug fixes, and I have NOT bumped the MAJOR or MINOR version in version.json:
  • Feature update backwards compatible feature updates, and I have bumped the MINOR version in version.json.
  • Breaking changes and I have bumped the MAJOR version in version.json.
  • Update to documentation
• Update to CI Environment or utilities (Non-module affecting changes)

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