.sync/Version.njk: Update Mu repos to Mu DevOps v6.0.0 (and container)

[makubacki]

Changes since last release: https://github.com/microsoft/mu_devops/compare/v5.0.6...v6.0.0

General release info: https://github.com/microsoft/mu_devops/releases

• The ubuntu-22-build container image is also updated to the latest: 9ab29bc.
  • Note: This is the first release with Rust dev support.
• v6.0.0 also brings some new changes in the pipelines for Project Mu repos to build rust in CI.

[makubacki]

Note: The v6.0.0 release will be made after this PR completes.