fix: remove not-yet-released sns 0.4.8 from dependencies #600

Job	Run time
test-extension (macos-14, nns)	16m 16s
test-extension (macos-14, nns, pocketic)	18m 16s
test-extension (macos-14, sns)	16m 47s
test-extension (macos-14, sns, pocketic)	17m 1s
test-extension (ubuntu-20.04, nns)	15m 11s
test-extension (ubuntu-20.04, nns, pocketic)	16m 57s
test-extension (ubuntu-20.04, sns)	16m 18s
test-extension (ubuntu-20.04, sns, pocketic)	16m 27s
e2e:required	1s
	2h 13m 14s

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