Bump Microsoft.VisualStudio.SDK and System.Text.Json in /src

Bumps Microsoft.VisualStudio.SDK and [System.Text.Json](https://github.com/dotnet/runtime). These dependencies needed to be updated together.

Updates `Microsoft.VisualStudio.SDK` from 17.0.32112.339 to 17.8.37222

Updates `System.Text.Json` from 6.0.9 to 7.0.3
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v6.0.9...v7.0.3)

---
updated-dependencies:
- dependency-name: Microsoft.VisualStudio.SDK
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

src/GUI/PowerToolsExtensionPack/PowerToolsExtensionPack.csproj

@@ -69,7 +69,7 @@
     <Reference Include="System" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.0.32112.339" ExcludeAssets="runtime" />
+    <PackageReference Include="Microsoft.VisualStudio.SDK" Version="17.8.37222" ExcludeAssets="runtime" />
     <PackageReference Include="Microsoft.VSSDK.BuildTools" Version="17.8.2365">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>