revert wrong file

src/renderers/shaders/ShaderChunk/alphamap_fragment.glsl.js

@@ -1,7 +1,7 @@
 export default /* glsl */`
 #ifdef USE_ALPHAMAP
 
-  diffuseColor.a *= texture2D( alphaMap, vUv ).g;
+	diffuseColor.a *= texture2D( alphaMap, vUv ).g;
 
 #endif
 `;