Comment tweak...

...while reviewing GetTextureData() functionality on OpenGL ES 2.0

src/rlgl.c

@@ -2202,7 +2202,7 @@ void *rlReadTexturePixels(Texture2D texture)
     glBindFramebuffer(GL_FRAMEBUFFER, fbo.id);
     glBindTexture(GL_TEXTURE_2D, 0);
 
-    // Attach our texture to FBO -> Texture must be RGB
+    // Attach our texture to FBO -> Texture must be RGBA
     // NOTE: Previoust attached texture is automatically detached
     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture.id, 0);