Move Testing section to above instructions in PR template. · project-chip/connectedhomeip@4497d08

Failed to save: Cache service responded with 409 during commit cache.

Volume mount /:/runner-root-volume is going to mount '/' into the container which may cause file ownership change in the entire file system and cause Actions Runner to lose permission to access the disk.

`pre` execution is not supported for local action from './.github/actions/checkout-submodules-and-bootstrap'