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

Bumps Microsoft.VisualStudio.Azure.Containers.Tools.Targets from 1.14.0 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] <[email protected]>

Author: dependabot[bot]

Fritz.StreamTools/Fritz.StreamTools.csproj

@@ -29,7 +29,7 @@
 		<PackageReference Include="LazyCache.AspNetCore" Version="2.4.0" />
 		<PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" Version="9.0.0" />
 		<PackageReference Include="Microsoft.Azure.CognitiveServices.Language.TextAnalytics" Version="4.0.0" />
-		<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.14.0" />
+		<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
 		<PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="8.0.5" />
 		<PackageReference Include="Octokit" Version="0.50.0" />
 		<PackageReference Include="System.Formats.Asn1" Version="8.0.1" />