Bump Microsoft.VisualStudio.Azure.Containers.Tools.Targets

Bumps Microsoft.VisualStudio.Azure.Containers.Tools.Targets from 1.20.1 to 1.21.0.

---
updated-dependencies:
- dependency-name: Microsoft.VisualStudio.Azure.Containers.Tools.Targets
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

GotifySmtpForwarder/GotifySmtpForwarder.csproj

@@ -13,7 +13,7 @@
         <PackageReference Include="MailKit" Version="4.6.0"/>
         <PackageReference Include="Microsoft.Extensions.Hosting" Version="8.0.0"/>
         <PackageReference Include="Microsoft.Extensions.Http.Polly" Version="8.0.6"/>
-        <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.20.1"/>
+        <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0"/>
         <PackageReference Include="MimeKit" Version="4.6.0"/>
         <PackageReference Include="Polly.Contrib.WaitAndRetry" Version="1.1.1"/>
         <PackageReference Include="Refit.HttpClientFactory" Version="7.1.0"/>