Update GitVersionTask to latest version

We are currently using one of the early releases of GitVersion 5.x. There have since been quite a few updates, with the latest being `5.2.4`. That said, the `5.2.x` versions seem to have a number of problems, with multiple patches having been released over the last two weeks. Further, the latest yields errors with the `GitVersionTask.targets`. Given that, we're going to stick with the `5.1.x` release from December, which appears to be stable; we'll reevaluate the `5.2.x` version in a few weeks, once it has (hopefully) stabilized. Fortunately, as a development-only dependency, this doesn't affect downstream consumers, just our internal build process.

Author: JeremyCaney

OnTopic.Editor.AspNetCore/OnTopic.Editor.AspNetCore.csproj

@@ -26,7 +26,7 @@
 
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
-    <PackageReference Include="GitVersionTask" Version="5.0.1">
+    <PackageReference Include="GitVersionTask" Version="5.1.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

OnTopic.Editor.Models/OnTopic.Editor.Models.csproj

@@ -23,7 +23,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="GitVersionTask" Version="5.0.1">
+    <PackageReference Include="GitVersionTask" Version="5.1.3">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>