Bump coverallsapp/github-action from 1.1.2 to 2.3.6 #297

Job	Run time
ruby-versions / Generate Ruby versions	3s
Ruby 3.4 unit testing on windows-latest	10m 9s
Ruby 3.3 unit testing on windows-latest	10m 41s
Ruby 3.1 unit testing on windows-latest	9m 28s
Ruby 3.2 unit testing on windows-latest	10m 8s
Ruby 4.0 unit testing on windows-latest	9m 59s
	50m 28s

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