Update supported GitHub Enterprise Server versions #8185

Job	Run time
Ruby analysis (ubuntu-latest, linked)	41s
Ruby analysis (macos-latest, nightly-latest)	1m 1s
Ruby analysis (macos-latest, linked)	43s
Ruby analysis (macos-latest, default)	1m 19s
Ruby analysis (ubuntu-latest, nightly-latest)	47s
Ruby analysis (ubuntu-latest, default)	43s
	5m 14s

Provide feedback