Fix several typos on the documentation and code. Add to the README ho… #638

Job	Run time
Unit test (ubuntu-22.04, 2.3)	1m 15s
Unit test (ubuntu-22.04, 2.7)	33s
Unit test (ubuntu-22.04, 3.1)	22s
Unit test (ubuntu-22.04, 2.1)	57s
Unit test (ubuntu-22.04, 2.6)	33s
Unit test (ubuntu-22.04, 2.5)	35s
Unit test (ubuntu-22.04, 2.4)	1m 7s
Unit test (ubuntu-22.04, 3)	22s
Unit test (ubuntu-22.04, jruby-9.1)	59s
Unit test (ubuntu-22.04, 3.2)	20s
Unit test (macos-latest, 2.7)	45s
Unit test (ubuntu-22.04, jruby-9.3)	52s
Unit test (ubuntu-22.04, 3.4)	22s
Unit test (ubuntu-22.04, 3.3)	23s
Unit test (ubuntu-22.04, jruby-9.4)	56s
Unit test (ubuntu-22.04, truffleruby)	2m 9s
Unit test (ubuntu-22.04, jruby-9.2)	1m 2s
Unit test (macos-latest, 2.6)	58s
Unit test (macos-latest, 3.4)	21s
Unit test (macos-latest, 3.3)	33s
Unit test (macos-latest, 3.1)	24s
Unit test (macos-latest, 3)	21s
Unit test (macos-latest, 3.2)	27s
Unit test (macos-latest, jruby-9.3)	48s
Unit test (windows-latest, 2.4)	1m 41s
Unit test (macos-latest, jruby-9.4)	49s
Unit test (windows-latest, 2.7)	1m 56s
Unit test (macos-latest, truffleruby)	1m 40s
Unit test (windows-latest, 2.2)	1m 50s
Unit test (windows-latest, 2.6)	1m 54s
Unit test (windows-latest, 3.1)	1m 19s
Unit test (windows-latest, 2.5)	1m 53s
Unit test (windows-latest, 3)	1m 8s
Unit test (windows-latest, 3.3)	1m 8s
Unit test (windows-latest, 2.3)	1m 45s
Unit test (windows-latest, 3.2)	2m 3s
Unit test (windows-latest, 3.4)	1m 6s
finish	3s
	37m 39s

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