Improve README Emoji mode table #60

Job	Run time
Ruby 3.3 (windows-latest)	1m 52s
Ruby 3.3 (ubuntu-latest)	9s
Ruby 3.2 (windows-latest)	56s
Ruby 3.3 (macos-latest)	11s
Ruby 3.1 (windows-latest)	59s
Ruby 3.2 (ubuntu-latest)	15s
Ruby 3.0 (windows-latest)	55s
Ruby 3.2 (macos-latest)	11s
Ruby 2.7 (windows-latest)	1m 48s
Ruby 3.1 (ubuntu-latest)	8s
Ruby jruby (windows-latest)	1m 21s
Ruby 3.1 (macos-latest)	10s
Ruby 3.0 (ubuntu-latest)	11s
Ruby 3.0 (macos-latest)	9s
Ruby 2.7 (ubuntu-latest)	19s
Ruby 2.7 (macos-latest)	23s
Ruby jruby (ubuntu-latest)	35s
Ruby jruby (macos-latest)	35s
Ruby truffleruby (ubuntu-latest)	30s
Ruby truffleruby (macos-latest)	24s
	12m 1s

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