Update rlgl.h

src/rlgl.h

@@ -59,14 +59,15 @@
 *       #define RL_CULL_DISTANCE_NEAR              0.01    // Default projection matrix near cull distance
 *       #define RL_CULL_DISTANCE_FAR             1000.0    // Default projection matrix far cull distance
 *
-*       When loading a shader, the following vertex attribute and uniform
+*       When loading a shader, the following vertex attributes and uniform
 *       location names are tried to be set automatically:
 *
 *       #define RL_DEFAULT_SHADER_ATTRIB_NAME_POSITION     "vertexPosition"    // Bound by default to shader location: 0
 *       #define RL_DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD     "vertexTexCoord"    // Bound by default to shader location: 1
 *       #define RL_DEFAULT_SHADER_ATTRIB_NAME_NORMAL       "vertexNormal"      // Bound by default to shader location: 2
 *       #define RL_DEFAULT_SHADER_ATTRIB_NAME_COLOR        "vertexColor"       // Bound by default to shader location: 3
 *       #define RL_DEFAULT_SHADER_ATTRIB_NAME_TANGENT      "vertexTangent"     // Bound by default to shader location: 4
+*       #define RL_DEFAULT_SHADER_ATTRIB_NAME_TEXCOORD2    "vertexTexCoord2"   // Bound by default to shader location: 5
 *       #define RL_DEFAULT_SHADER_UNIFORM_NAME_MVP         "mvp"               // model-view-projection matrix
 *       #define RL_DEFAULT_SHADER_UNIFORM_NAME_VIEW        "matView"           // view matrix
 *       #define RL_DEFAULT_SHADER_UNIFORM_NAME_PROJECTION  "matProjection"     // projection matrix