Bump actions/upload-pages-artifact from 3 to 4 #620

Job	Run time
Test without C extension	3m 10s
Test isolated (ruby)	3m 33s
Test isolated (2.3)	3m 49s
Tests: Ruby jruby - ubuntu	5m 9s
Tests: Ruby 2.7 - ubuntu	3m 24s
Tests: Ruby 3.4 - ubuntu	3m 7s
Tests: Ruby 3.1 - ubuntu	3m 8s
Tests: Ruby 3.3 - ubuntu	3m 12s
Tests: Ruby 3.0 - ubuntu	3m 9s
Tests: Ruby truffleruby - ubuntu	4m 14s
Tests: Ruby 2.4 - ubuntu	3m 19s
Tests: Ruby 2.5 - ubuntu	3m 18s
Tests: Ruby 2.6 - ubuntu	3m 28s
Tests: Ruby 3.2 - ubuntu	3m 15s
Tests: Ruby 2.3 - ubuntu	3m 19s
Tests: Ruby ruby - windows	3m 58s
	56m 32s

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