docs: Fix category of GetRecordDirectory`

[dnaka91]

Description

Fix the category of the GetRecordDirectory request.

Motivation and Context

The category was rconfig instead of config (probably a misspell), which caused it to be missing from the generated protocol.md documentation.

How Has This Been Tested?

Tested OS(s):

Types of changes

• Documentation change (a change to documentation pages)

Checklist:

• [x] I have read the Contributing Guidelines.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] My code is not on master or a release/* branch.
• [x] The code has been tested.
• [ ] I have included updates to all appropriate documentation.