fixed typo in NavigationPolygon doc
fixed typo in NavigationPolygon doc

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