Bump imageio from 2.31.3 to 2.31.4 in /requirements #577

Job	Run time
Build wheels on MacOS	0s
Build documentation	4m 9s
Build and Test (3.8, ubuntu-latest)	4m 13s
Build and Test (3.8, windows-latest)	7m 49s
Build and Test (3.9, ubuntu-latest)	5m 7s
Build and Test (3.9, windows-latest)	5m 36s
Build and Test (3.10, ubuntu-latest)	4m 17s
Build and Test (3.10, windows-latest)	4m 44s
Build and Test (3.11, ubuntu-latest)	4m 2s
Build and Test (3.11, windows-latest)	7m 17s
Upload development documentation	0s
Release	0s
Upload release documentation	0s
	47m 14s

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