chore(deps): update dependency microsoft.aspnetcore.components.webassembly to 8.0.21

Author: renovate[bot]

templates/template-blazor/src/{% project_name_pascal_case %}.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.19" />
+    <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly" Version="8.0.21" />
     <PackageReference Include="Microsoft.AspNetCore.Components.WebAssembly.DevServer" Version="8.0.19" PrivateAssets="all" />
   </ItemGroup>