Bump softprops/action-gh-release from 2.0.5 to 2.0.6 #1957

Job	Run time
Build Echidna on ubuntu-20.04	5m 47s
Build Echidna on macos-13	36m 13s
Build Echidna on windows-latest	14m 34s
Test with solc 0.4.25 on ubuntu-latest	5m 3s
Test with solc 0.5.7 on ubuntu-latest	3m 30s
Test with solc 0.6.12 on ubuntu-latest	3m 31s
Test with solc 0.7.5 on ubuntu-latest	4m 11s
Test with solc 0.4.25 on windows-latest	4m 34s
Test with solc 0.5.7 on windows-latest	4m 3s
Test with solc 0.6.12 on windows-latest	4m 39s
Test with solc 0.7.5 on windows-latest	5m 1s
	1h 31m 6s

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