Bump mymindstorm/setup-emsdk from 12 to 13 #59

Job	Run time
🤖 Android / Android Build template_debug arm64	7m 8s
🍏 iOS / iOS Build template_debug arm64	16m 28s
🤖 Android / Android Build template_debug x86_64	7m 11s
🍏 iOS / iOS Build template_release arm64	11m 45s
🐧 Linux / Linux Build template_debug x86_64	11m 1s
🤖 Android / Android Build template_release arm64	7m 11s
🐧 Linux / Linux Build template_release x86_64	10m 56s
🤖 Android / Android Build template_release x86_64	6m 56s
🍎 macOS / macOS Build template_debug universal	20m 38s
🏁 Windows / Windows Build template_debug x86_32	11m 58s
🍎 macOS / macOS Build template_release universal	36m 19s
🏁 Windows / Windows Build template_debug x86_64	12m 13s
🏁 Windows / Windows Build template_release x86_32	12m 15s
🏁 Windows / Windows Build template_release x86_64	12m 5s
	3h 4m 4s

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