Bump Discord.Net.Webhook from 3.18.0 to 3.19.1

---
updated-dependencies:
- dependency-name: Discord.Net.Webhook
  dependency-version: 3.19.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

Refresh.Core/Refresh.Core.csproj

@@ -20,7 +20,7 @@
         <PackageReference Include="BCnEncoder.Net" Version="2.2.1" />
         <PackageReference Include="BCrypt.Net-Next" Version="4.0.3" />
         <PackageReference Include="CommandLineParser" Version="2.9.1" />
-        <PackageReference Include="Discord.Net.Webhook" Version="3.18.0" />
+        <PackageReference Include="Discord.Net.Webhook" Version="3.19.1" />
         <PackageReference Include="DnsClient" Version="1.8.0" />
         <PackageReference Include="MailKit" Version="4.16.0" />
         <PackageReference Include="NPTicket" Version="3.1.1" />