build

Suppress warnings by gcc-13 with `-Og` #1663

Job	Run time
ruby-versions / Generate Ruby versions	5s
build (2.7 / ubuntu-latest)	28s
build (2.6 / ubuntu-latest)	36s
build (2.6 / macos-latest)	33s
build (2.7 / macos-latest)	39s
build (3.0 / windows-latest)	1m 6s
build (3.1 / ubuntu-latest)	17s
build (2.6 / windows-latest)	1m 40s
build (3.1 / windows-latest)	1m 32s
build (3.0 / ubuntu-latest)	17s
build (2.7 / windows-latest)	1m 38s
build (3.1 / macos-latest)	19s
build (3.2 / ubuntu-latest)	16s
build (3.3 / macos-latest)	21s
build (3.3 / ubuntu-latest)	18s
build (3.2 / macos-latest)	16s
build (3.2 / windows-latest)	1m 20s
build (3.4 / ubuntu-latest)	19s
build (mingw / windows-latest)	1m 0s
build (3.4 / macos-latest)	18s
build (3.0 / macos-latest)	22s
build (truffleruby-head / ubuntu-latest)	55s
build (3.4 / windows-latest)	1m 1s
build (3.3 / windows-latest)	1m 13s
build (head / ubuntu-latest)	19s
build (truffleruby-head / macos-latest)	49s
build (mswin / windows-2022)	2m 10s
build (head / macos-latest)	15s
	20m 22s

Provide feedback