Update reqwest requirement from 0.11.18 to 0.12.1 #133

Job	Run time
Build WebGL Example (ubuntu-latest)	47s
Build [OpenGL \| Linux (x86)]	56s
Build [OpenGL \| Linux (ARM)]	1m 18s
Build [OpenGL \| MacOS (x86)]	1m 6s
Build [OpenGL \| MacOS (ARM)]	1m 12s
Build [OpenGL \| Windows (x86)]	1m 29s
Build [WGPU \| Linux (x86)]	1m 42s
Build [WGPU \| Linux (ARM)]	2m 0s
Build [WGPU \| MacOS (x86)]	2m 20s
Build [WGPU \| MacOS (ARM)]	3m 38s
Build [WGPU \| Windows (x86)]	3m 9s
	19m 37s

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