v1.2.4

What's Changed

• Fix Bazel cache reuse on CI reruns by @Trinkle23897 in #410
• [pgx] Add remaining native PGX environments by @Trinkle23897 in #411
• Add MuJoCo Playground environments by @Trinkle23897 in #412

Full Changelog: v1.2.3...v1.2.4