Bump BouncyCastle.Cryptography from 2.3.0 to 2.3.1 in /Obsidian (#438)

Bumps [BouncyCastle.Cryptography](https://github.com/bcgit/bc-csharp) from 2.3.0 to 2.3.1.
- [Commits](bcgit/bc-csharp@release-2.3.0...release-2.3.1)

---
updated-dependencies:
- dependency-name: BouncyCastle.Cryptography
  dependency-type: direct:production
...

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Obsidian/Obsidian.csproj

@@ -53,7 +53,7 @@
 	</ItemGroup>
 
 	<ItemGroup>
-		<PackageReference Include="BouncyCastle.Cryptography" Version="2.3.0" />
+		<PackageReference Include="BouncyCastle.Cryptography" Version="2.3.1" />
 		<PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.9.2" />
 		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
 		<PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.0" />