Bump Azure.Security.KeyVault.Certificates from 4.1.0 to 4.1.1

Bumps [Azure.Security.KeyVault.Certificates](https://github.com/Azure/azure-sdk-for-net) from 4.1.0 to 4.1.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-net/releases)
- [Commits](Azure/azure-sdk-for-net@Azure.Security.KeyVault.Certificates_4.1.0...Azure.Security.KeyVault.Certificates_4.1.1)

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

NuGetKeyVaultSignTool.Core/NuGetKeyVaultSignTool.Core.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Security.KeyVault.Certificates" Version="4.1.0" />
+    <PackageReference Include="Azure.Security.KeyVault.Certificates" Version="4.1.1" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.9" />
     <PackageReference Include="NuGet.Packaging" Version="5.8.0-preview.3.6823" />
     <PackageReference Include="NuGet.Protocol" Version="5.8.0-preview.3.6823" />