Fix forum url navigation
Fix forum url navigation

ppy/osu-web,ppy/osu-web,nanaya/osu-web,nanaya/osu-web,notbakaneko/osu-web,nanaya/osu-web,nanaya/osu-web,notbakaneko/osu-web,ppy/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,ppy/osu-web,ppy/osu-web,notbakaneko/osu-web,nanaya/osu-web