Tests

Add a line about the Docker + DX change #138

Job	Run time
Ruby: 3.3, Rails: 7.2, Channel: stable	1m 0s
Ruby: 3.3, Rails: 7.1, Channel: stable	1m 1s
Ruby: 3.2, Rails: 7.0, Channel: stable	51s
Ruby: 3.2, Rails: 7.1, Channel: stable	1m 0s
Ruby: ruby-head, Rails: edge, Channel: experimental	54s
Ruby: 3.1, Rails: 6.1, Channel: stable	47s
Ruby: 3.2, Rails: 7.2, Channel: stable	49s
Ruby: 3.1, Rails: 7.2, Channel: stable	53s
Ruby: ruby-head, Rails: 7.1, Channel: experimental	55s
Ruby: 3.3, Rails: edge, Channel: experimental	1m 0s
Ruby: 3.1, Rails: 7.0, Channel: stable	53s
Ruby: 3.2, Rails: edge, Channel: experimental	51s
Ruby: 3.1, Rails: 7.1, Channel: stable	55s
Ruby: ruby-head, Rails: 7.2, Channel: experimental	47s
Ruby: 3.1, Rails: edge, Channel: experimental	42s
	13m 18s

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