Add Masato Nakamura to contributing #101

Job	Run time
Ruby 2.4 - macos-latest	1m 1s
Ruby 2.5 - macos-latest	55s
Ruby 2.6 - macos-latest	1m 5s
Ruby 2.7 - macos-latest	1m 3s
Ruby 3.0 - macos-latest	37s
Ruby 3.1 - macos-latest	26s
Ruby 3.2 - macos-latest	28s
Ruby 3.3 - macos-latest	36s
Ruby head - macos-latest	29s
Ruby jruby - macos-latest	3m 59s
Ruby jruby-head - macos-latest	3m 10s
Ruby truffleruby - macos-latest	1m 30s
Ruby 2.4 - ubuntu-20.04	21s
Ruby 2.5 - ubuntu-20.04	23s
Ruby 2.6 - ubuntu-20.04	27s
Ruby 2.7 - ubuntu-20.04	25s
Ruby 3.0 - ubuntu-20.04	13s
Ruby 3.1 - ubuntu-20.04	13s
Ruby 3.2 - ubuntu-20.04	11s
Ruby 3.3 - ubuntu-20.04	19s
Ruby head - ubuntu-20.04	15s
Ruby jruby - ubuntu-20.04	1m 44s
Ruby jruby-head - ubuntu-20.04	1m 48s
Ruby truffleruby - ubuntu-20.04	48s
Ruby mingw - windows-latest	1m 33s
Ruby mswin - windows-latest	1m 26s
Ruby jruby - windows-latest	3m 40s
Ruby head - ubuntu-22.04	10s
Ruby 3.1 - ubuntu-22.04	15s
Ruby 3.2 - ubuntu-22.04	13s
Ruby 3.3 - ubuntu-22.04	24s
	30m 7s

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