[Shapes] Remove duplicate color calls in DrawGrid (#4148)

* Update raylib_api.* by CI

* No need to call the color 4 times in a row, it's batched

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

src/rmodels.c

@@ -1072,16 +1072,10 @@ void DrawGrid(int slices, float spacing)
             if (i == 0)
             {
                 rlColor3f(0.5f, 0.5f, 0.5f);
-                rlColor3f(0.5f, 0.5f, 0.5f);
-                rlColor3f(0.5f, 0.5f, 0.5f);
-                rlColor3f(0.5f, 0.5f, 0.5f);
             }
             else
             {
                 rlColor3f(0.75f, 0.75f, 0.75f);
-                rlColor3f(0.75f, 0.75f, 0.75f);
-                rlColor3f(0.75f, 0.75f, 0.75f);
-                rlColor3f(0.75f, 0.75f, 0.75f);
             }
 
             rlVertex3f((float)i*spacing, 0.0f, (float)-halfSlices*spacing);