fix precision tests

tests/SixLabors.Shapes.Tests/RegularPolygonTests.cs

@@ -56,7 +56,7 @@ namespace SixLabors.Shapes.Tests
         public void GeneratesCorrectPath()
         {
             float radius = 10;
-            int pointsCount = new Random().Next(3, 99);
+            int pointsCount = new Random().Next(3, 20);
 
             var poly = new RegularPolygon(Vector2.Zero, pointsCount, radius, 0);
             var path = poly.AsPath();
@@ -76,8 +76,8 @@ namespace SixLabors.Shapes.Tests
                 }
 
                 var actual = Vector2.Distance(points[i], points[j]);
-                Assert.Equal(baseline, actual, 4);
-                Assert.Equal(radius, Vector2.Distance(Vector2.Zero, points[i]), 4);
+                Assert.Equal(baseline, actual, 3);
+                Assert.Equal(radius, Vector2.Distance(Vector2.Zero, points[i]), 3);
             }
         }