build(deps): bump site/_data/plugin-repository

Bumps [site/_data/plugin-repository](https://github.com/OpenTabletDriver/Plugin-Repository) from `2a57de4` to `b9a1f5b`.
- [Commits](OpenTabletDriver/Plugin-Repository@2a57de4...b9a1f5b)

---
updated-dependencies:
- dependency-name: site/_data/plugin-repository
  dependency-version: b9a1f5b040dc662db1d34405eb88d50bd6bf1b2c
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]