Merge pull request #114 from freude/freude-patch-15

Update README.md

README.md

@@ -3,7 +3,7 @@
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+[![codecov](https://codecov.io/gh/freude/NanoNet/graph/badge.svg?token=A765CQUD6R)](https://codecov.io/gh/freude/NanoNet)
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