Update dependency BouncyCastle.Cryptography to 2.6.0

Author: renovate[bot]

DebianRepository/DebianRepository.csproj

@@ -8,7 +8,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="BouncyCastle.Cryptography" Version="2.5.1" />
+        <PackageReference Include="BouncyCastle.Cryptography" Version="2.6.0" />
         <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="9.0.3" />
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.3"/>
         <PackageReference Include="Swashbuckle.AspNetCore" Version="8.1.0" />