Fix typos and improve clarity in Tween docs
Fix typos and improve clarity in Tween docs

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