Bump docker/setup-buildx-action from 2 to 3 #27

Job	Run time
linux_coverage (ubuntu-20.04, gcc)	1m 4s
build_osx_autotools_default_args	1m 32s
linux_coverage (ubuntu-22.04, gcc)	51s
linux (ubuntu-20.04, gcc)	1m 20s
linux_coverage (ubuntu-latest, gcc)	1m 5s
linux (ubuntu-20.04, clang)	1m 29s
linux (ubuntu-22.04, gcc)	1m 14s
linux_scanbuild (ubuntu-20.04)	2m 23s
nix-matrix	14s
linux (ubuntu-22.04, clang)	1m 21s
linux (ubuntu-latest, gcc)	1m 21s
linux (ubuntu-latest, clang)	1m 22s
nix ("default")	54s
nix ("handlebars-c")	52s
nix ("handlebars-c-cmake")	40s
nix ("handlebars-c-minimal")	47s
nix ("handlebars-c-static")	46s
nix ("pre-commit-check")	30s
	19m 45s

Provide feedback