fix: remove shield from readme

Author: unsafePtr

README.md

@@ -1,8 +1,5 @@
 # Base58 Encoding Library
 
-[![NuGet](https://img.shields.io/nuget/v/Base58Encoding.svg)](https://www.nuget.org/packages/Base58Encoding/)
-[![NuGet Downloads](https://img.shields.io/nuget/dt/Base58Encoding.svg)](https://www.nuget.org/packages/Base58Encoding/)
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 A .NET 9.0 Base58 encoding and decoding library with support for multiple alphabet variants.
 
 ## Features