Bump peaceiris/actions-gh-pages from 3 to 4 (#170) #425

Job	Run time
Test and Deploy on latest (Debug)	17m 52s
Indepth Tests (Debug, all libraries)	26m 49s
Test on stable (Debug)	9m 44s
Test and Deploy on latest (Release)	29m 17s
Indepth Tests (Debug, no libraries)	21m 36s
Test on stable (Release)	10m 7s
Indepth Tests (Release, all libraries)	27m 56s
Indepth Tests (Release, no libraries)	23m 44s
Email notification	5s
	2h 47m 10s

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