update README.md

README.md

@@ -7,4 +7,5 @@ The Nim badgemaker tool.
 [![test2](https://github.com/Ethosa/badgemaker/blob/master/tests/test2.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test2.svg)  
 [![test3](https://github.com/Ethosa/badgemaker/blob/master/tests/test3.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test3.svg)  
 [![test4](https://github.com/Ethosa/badgemaker/blob/master/tests/test4.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test4.svg)  
-[![test5](https://github.com/Ethosa/badgemaker/blob/master/tests/test5.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test5.svg)
+[![test5](https://github.com/Ethosa/badgemaker/blob/master/tests/test5.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test5.svg)  
+[![test6](https://github.com/Ethosa/badgemaker/blob/master/tests/test6.svg)](https://github.com/Ethosa/badgemaker/blob/master/tests/test6.svg)

tests/test3.svg

@@ -1,4 +1,4 @@
-<svg width="120" xmlns="http://www.w3.org/2000/svg" height="20">
+<svg width="120" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" height="20">
   <linearGradient x2="0" id="gradient" y2="100%">
     <stop stop-color="#bbb" stop-opacity="0" offset="0" />
     <stop stop-opacity="0" offset="1" />