Rename Hdr as Srgb texture import option to be lowercase
Rename Hdr as Srgb texture import option to be lowercase

Unlike all other import options, Hdr As Srgb was internally spelled
out with uppercase characters.

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