Fix typo in Tabs doc.
Fix typo in Tabs doc.

I don't know enough about grammar to say why the "ing" suffix is
correct, but I'm reasonably sure it is :)

vnen/godot,josempans/godot,Zylann/godot,ZuBsPaCe/godot,firefly2442/godot,MarianoGnu/godot,akien-mga/godot,vnen/godot,firefly2442/godot,godotengine/godot,Faless/godot,josempans/godot,Shockblast/godot,DmitriySalnikov/godot,Valentactive/godot,honix/godot,vkbsb/godot,firefly2442/godot,akien-mga/godot,firefly2442/godot,honix/godot,vkbsb/godot,BastiaanOlij/godot,honix/godot,Shockblast/godot,sanikoyes/godot,akien-mga/godot,Valentactive/godot,guilhermefelipecgs/godot,akien-mga/godot,Zylann/godot,Faless/godot,vkbsb/godot,Faless/godot,BastiaanOlij/godot,ZuBsPaCe/godot,Zylann/godot,vkbsb/godot,guilhermefelipecgs/godot,josempans/godot,sanikoyes/godot,MarianoGnu/godot,pkowal1982/godot,pkowal1982/godot,ZuBsPaCe/godot,vnen/godot,BastiaanOlij/godot,Shockblast/godot,Faless/godot,godotengine/godot,honix/godot,Valentactive/godot,sanikoyes/godot,honix/godot,josempans/godot,guilhermefelipecgs/godot,BastiaanOlij/godot,josempans/godot,Shockblast/godot,guilhermefelipecgs/godot,DmitriySalnikov/godot,godotengine/godot,sanikoyes/godot,josempans/godot,Zylann/godot,ZuBsPaCe/godot,sanikoyes/godot,firefly2442/godot,Valentactive/godot,guilhermefelipecgs/godot,vnen/godot,vkbsb/godot,ZuBsPaCe/godot,Zylann/godot,josempans/godot,guilhermefelipecgs/godot,akien-mga/godot,Faless/godot,guilhermefelipecgs/godot,godotengine/godot,ZuBsPaCe/godot,BastiaanOlij/godot,sanikoyes/godot,honix/godot,sanikoyes/godot,Shockblast/godot,pkowal1982/godot,firefly2442/godot,Faless/godot,MarianoGnu/godot,BastiaanOlij/godot,MarianoGnu/godot,akien-mga/godot,vnen/godot,DmitriySalnikov/godot,MarianoGnu/godot,MarianoGnu/godot,vkbsb/godot,akien-mga/godot,vnen/godot,vkbsb/godot,godotengine/godot,BastiaanOlij/godot,Shockblast/godot,Valentactive/godot,pkowal1982/godot,firefly2442/godot,BastiaanOlij/godot,firefly2442/godot,MarianoGnu/godot,Valentactive/godot,Valentactive/godot,Faless/godot,godotengine/godot,vnen/godot,pkowal1982/godot,godotengine/godot,DmitriySalnikov/godot,josempans/godot,ZuBsPaCe/godot,pkowal1982/godot,DmitriySalnikov/godot,DmitriySalnikov/godot,Shockblast/godot,Faless/godot,sanikoyes/godot,Shockblast/godot,ZuBsPaCe/godot,guilhermefelipecgs/godot,Valentactive/godot,DmitriySalnikov/godot,vnen/godot,pkowal1982/godot,Zylann/godot,godotengine/godot,pkowal1982/godot,akien-mga/godot,Zylann/godot,vkbsb/godot,MarianoGnu/godot,Zylann/godot