update checkout version and clean after success

NOAA-EMC / hpc-stack

Create a software stack for HPC's

GNU Lesser General Public License v2.1

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Closed aerorahul closed 1 year ago

aerorahul commented 1 year ago

This PR:

updates the checkout action to v3 to remove annoying Github Actions warnings
cleans out the pkg/ directory after a successful action. This should not be necessary as the scratch space is cleaned out automatically, but it does no harm.