[rubygems/rubygems] Fix `bundle outdated <GEM>` failing if gems not i… #234

Job	Run time
cargo test	50s
make (check, --enable-yjit, --yjit)	7m 59s
make (check, --enable-yjit=dev, --yjit-call-threshold=1 --yjit-verify-ctx --yjit-code-gc, -T --yj...	20m 37s
YJIT macOS Arm64 result	1s
	29m 27s

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