Bump the nuget group with 1 update

Bumps Microsoft.Build.Tasks.Core from 17.14.8 to 17.14.28

---
updated-dependencies:
- dependency-name: Microsoft.Build.Tasks.Core
  dependency-version: 17.14.28
  dependency-type: direct:production
  dependency-group: nuget
...

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

Author: dependabot[bot]

build/_build.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.8" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.14.28" />
     <PackageDownload Include="GitVersion.Tool" Version="[6.1.0]" />
   </ItemGroup>