Bump FSharp.Core from 5.0.2 to 8.0.400

Bumps [FSharp.Core](https://github.com/dotnet/fsharp) from 5.0.2 to 8.0.400.
- [Release notes](https://github.com/dotnet/fsharp/releases)
- [Changelog](https://github.com/dotnet/fsharp/blob/main/release-notes.md)
- [Commits](https://github.com/dotnet/fsharp/commits)

---
updated-dependencies:
- dependency-name: FSharp.Core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/FsHttp.FSharpData/FsHttp.FSharpData.fsproj

@@ -22,6 +22,6 @@
   <ItemGroup>
     <ProjectReference Include="..\FsHttp\FsHttp.fsproj" />
     <!-- See comments for FSharp.Core in FsHttp.fsproj -->
-    <PackageReference Include="FSharp.Core" Version="5.0.2" ExcludeAssets="contentfiles" />
+    <PackageReference Include="FSharp.Core" Version="8.0.400" ExcludeAssets="contentfiles" />
   </ItemGroup>
 </Project>

src/FsHttp.NewtonsoftJson/FsHttp.NewtonsoftJson.fsproj

@@ -24,6 +24,6 @@
   <ItemGroup>
     <ProjectReference Include="..\FsHttp\FsHttp.fsproj" />
     <!-- See comments for FSharp.Core in FsHttp.fsproj -->
-    <PackageReference Include="FSharp.Core" Version="5.0.2" ExcludeAssets="contentfiles" />
+    <PackageReference Include="FSharp.Core" Version="8.0.400" ExcludeAssets="contentfiles" />
   </ItemGroup>
 </Project>

src/FsHttp/FsHttp.fsproj

@@ -46,6 +46,6 @@
         Removal triggers issues in dotnet publish, e.g. for Lambda projects
         Also avoids Rider search finding stuff in FSharp.Core.xml
     -->
-    <PackageReference Include="FSharp.Core" Version="5.0.2" ExcludeAssets="contentfiles" />
+    <PackageReference Include="FSharp.Core" Version="8.0.400" ExcludeAssets="contentfiles" />
   </ItemGroup>
 </Project>