[Matcher] Update README documentation #247

Job	Run time
minitest (3.0, rails_6_1_3_1, vips)	37s
minitest (3.0, rails_6_1_3_1, mini_magick)	48s
minitest (3.0, rails_7_0, vips)	25s
minitest (3.0, rails_7_0, mini_magick)	30s
minitest (3.0, rails_7_1, vips)	41s
minitest (3.0, rails_7_1, mini_magick)	35s
minitest (3.0, rails_next, vips)	27s
minitest (3.0, rails_next, mini_magick)	36s
minitest (3.1, rails_7_0, vips)	31s
minitest (3.1, rails_7_0, mini_magick)	33s
minitest (3.1, rails_7_1, vips)	24s
minitest (3.1, rails_7_1, mini_magick)	41s
minitest (3.1, rails_next, vips)	45s
minitest (3.1, rails_next, mini_magick)	43s
minitest (3.2, rails_7_0, vips)	26s
minitest (3.2, rails_7_0, mini_magick)	46s
minitest (3.2, rails_7_1, vips)	35s
minitest (3.2, rails_7_1, mini_magick)	28s
minitest (3.2, rails_next, vips)	32s
minitest (3.2, rails_next, mini_magick)	49s
	11m 52s

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