fix error in uv rotate node.

MaterialGraphProject/Assets/UnityShaderEditor/Runtime/Nodes/UV/UVRotatorNode.cs

 {
     //rotation matrix
     uv.xy -= 0.5;
-    {0} s = sin(rotation);
-    {0} c = cos(rotation);
+    {precision} s = sin(rotation);
+    {precision} c = cos(rotation);
-    {0}2x2 rMatrix = float2x2(c, -s, s, c);
+    {precision}2x2 rMatrix = float2x2(c, -s, s, c);
-    rMatrix = rMatrix*2 - 1
+    rMatrix = rMatrix*2 - 1;
 
     //multiply the UVs by the rotation matrix
     uv.xy = mul(uv.xy, rMatrix);