CI: Bump actions/stale from 9 to 10 #982

Job	Run time
build-and-test (macos-14, 15.4, false) / build-and-test	12m 50s
build-and-test (macos-13, 15.2, true, vimtags, check-xcodeproj-compat) / build-and-test	16m 2s
build-and-test (macos-15, 16.4, true, true, true) / build-and-test	28m 6s
build-and-test (macos-13-xcode14-self-hosted, true, _10.9, true, true) / build-and-test	-1s
	56m 57s

Provide feedback