🤖 Bump BouncyCastle.NetCore from 1.8.6 to 1.8.8 (#3074)

Bumps [BouncyCastle.NetCore](https://github.com/chrishaly/bc-csharp) from 1.8.6 to 1.8.8.
- [Release notes](https://github.com/chrishaly/bc-csharp/releases)
- [Commits](https://github.com/chrishaly/bc-csharp/commits)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

shadowsocks-csharp/shadowsocks-csharp.csproj

@@ -22,7 +22,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="BouncyCastle.NetCore" Version="1.8.6" />
+    <PackageReference Include="BouncyCastle.NetCore" Version="1.8.8" />
     <!--TODO: Remove Fody related stuff, as they're either not actually used or has NET Core built-in alternate-->
     <PackageReference Include="Caseless.Fody" Version="1.9.0">
       <PrivateAssets>all</PrivateAssets>