Bump xunit.runner.utility from 2.6.1 to 2.6.3 in /src/devices/Mcp25xx…

…x/tests (#2254)

Bumps [xunit.runner.utility](https://github.com/xunit/xunit) from 2.6.1 to 2.6.3.
- [Commits](xunit/xunit@2.6.1...2.6.3)

---
updated-dependencies:
- dependency-name: xunit.runner.utility
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>