Update README.md

Author: toddmotto

README.md

@@ -11,7 +11,7 @@ ngx-errors
 
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-<a href="https://ultimateangular.com" target="_blank"><img src="https://ultimateangular.com/assets/img/banner.jpg"></a>
+<a href="https://ultimateangular.com" target="_blank"><img src="https://ultimateangular.com/assets/img/banners/ua-github.svg"></a>
 
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