README.md: Say .NET 8+.

README.md

@@ -4,7 +4,7 @@
 [![License](https://img.shields.io/badge/License-MIT-red.svg)](https://github.com/samuel-lucas6/Geralt/blob/main/LICENSE)
 [![NuGet](https://img.shields.io/badge/nuget-latest-blue)](https://www.nuget.org/packages/Geralt)
 
-[Geralt](https://www.geralt.xyz/) is a modern cryptographic library for [.NET 6+](https://dotnet.microsoft.com/en-us/download/dotnet) based on [libsodium](https://doc.libsodium.org/) and inspired by [Monocypher](https://monocypher.org/).
+[Geralt](https://www.geralt.xyz/) is a modern cryptographic library for [.NET 8+](https://dotnet.microsoft.com/en-us/download/dotnet) based on [libsodium](https://doc.libsodium.org/) and inspired by [Monocypher](https://monocypher.org/).
 
 - **Simple**: an easy-to-learn API with descriptive naming. Only one algorithm for each task is provided when possible.
 - **Modern**: the latest and greatest cryptographic algorithms, such as AEGIS-128L/AEGIS-256, (X)ChaCha20-Poly1305, BLAKE2b, Argon2id, X25519, and Ed25519.