docs: update Dynamic Configuration section

[kgeorgiou]

Update Dynamic Configuration section to match the variant attachment format updates introduced in #259

Description

Motivation and Context

Documentation.

How Has This Been Tested?

• docsify

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[zhouzhuojie]

Thanks for the PR. LGTM. I fixed the integration tests in #281. If you can rebase, everything will be good.

[codecov-io]

Codecov Report

Merging #280 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #280   +/-   ##
=======================================
  Coverage   81.76%   81.76%           
=======================================
  Files          26       26           
  Lines        1530     1530           
=======================================
  Hits         1251     1251           
  Misses        210      210           
  Partials       69       69

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[kgeorgiou]

Done :)

[zhouzhuojie]

🎉