try adding an "extended explanation" to compat bounds #1161

Job	Run time
Documentation	2m 19s
Unit/Julia 1.3/ubuntu-latest/x64	7m 54s
Unit/Julia 1.4/ubuntu-latest/x64	8m 53s
Doctests	1m 52s
Unit/Julia 1.5/ubuntu-latest/x64	7m 49s
Unit/Julia 1.6/ubuntu-latest/x64	5m 17s
Unit/Julia 1.7/ubuntu-latest/x64	6m 43s
Unit/Julia 1.8/ubuntu-latest/x64	5m 15s
Unit/Julia 1/ubuntu-latest/x64	4m 59s
Unit/Julia nightly/ubuntu-latest/x64	1m 26s
	52m 27s

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