Bump peter-evans/dockerhub-description from 3 to 4 (#98) #387

Job	Run time
Check	26s
Clippy	38s
Rustfmt	6s
MSRV	39s
spellcheck	7s
Test Suite (ubuntu-latest, stable)	3m 55s
Test Suite (ubuntu-latest, nightly)	4m 13s
Test Suite (macos-latest, stable)	5m 56s
Test Suite (macos-latest, nightly)	4m 16s
Test Suite (windows-latest, stable)	8m 11s
Test Suite (windows-latest, nightly)	4m 56s
	33m 23s

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