Fixup broken build after #15040

[sigprof]

Description

Rename keyboard files for kprepublic boards after moving them into revision directories.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

Build kprepublic/bm60poker/rev1:default                                [ERRORS]
Build kprepublic/bm60poker/rev1:via                                    [ERRORS]
Build kprepublic/bm60rgb/rev1:default                                  [ERRORS]
Build kprepublic/bm60rgb/rev1:via                                      [ERRORS]
Build kprepublic/bm60rgb_iso/rev1:default                              [ERRORS]

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).