ci: Bump Emacs 30 minor version to 2 #311

Job	Run time
test (ubuntu-latest, 27.2)	35s
test (ubuntu-latest, 29.4)	55s
test (ubuntu-latest, 26.3)	48s
test (ubuntu-latest, 30.2)	43s
test (ubuntu-latest, 28.2)	2m 59s
test (windows-latest, 26.3)	59m 58s
test (macos-latest, 29.4)	2m 31s
test (windows-latest, 30.2)	6m 10s
test (windows-latest, 29.4)	30m 7s
test (macos-latest, 30.2)	3m 7s
test (macos-latest, 28.2)	2m 46s
test (windows-latest, 28.2)	3m 35s
test (windows-latest, 27.2)	4m 34s
test (ubuntu-latest, snapshot, true)	1m 35s
test (windows-latest, snapshot, true)	7m 2s
test (macos-latest, snapshot, true)	3m 15s
	2h 10m 40s

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