Update @actions/core to use the file version of save-state and set-output workflow commands

[mazenkhalil]

The below warning is initiated from aws-actions/setup-sam@v2 step:

This is due to the depreciation of save-state and set-output workflow commands.

Kindly update @actions/core to use the file-command version of save-state and set-output workflow commands. Thank you!

[hoffa]

Thanks for reporting this! I've updated aws-actions/setup-sam@v2 with the newest version.