Bump actions/upload-artifact from 3 to 4 (#48) #133

Job	Run time
Ensure cogified files are up-to-date	12s
Build & verify package	54s
Verify dev env (ubuntu-latest)	12s
Verify dev env (windows-latest)	44s
Install and test with system package of Argon2.	19s
Verify dev env (macos-latest)	31s
Tests on 3.7	25s
Tests on 3.8	18s
Tests on 3.9	21s
Tests on 3.10	19s
Tests on 3.11	19s
Tests on 3.12	21s
Tests on pypy-3.8	40s
Tests on pypy-3.9	42s
Tests on pypy-3.10	51s
required-checks-pass	2s
	7m 10s

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