chore(deps): bump System.Text.Json

Bumps [System.Text.Json](https://github.com/dotnet/runtime) from 8.0.0-preview.7.23375.6 to 8.0.0-rc.1.23419.4.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.0-preview.7.23375.6...v8.0.0-rc.1.23419.4)

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Pinecone.csproj

@@ -27,7 +27,7 @@
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net7.0' Or '$(TargetFramework)' == 'net6.0'">
     <PackageReference Include="System.Net.Http.Json" Version="8.0.0-preview.7.23375.6" />
-    <PackageReference Include="System.Text.Json" Version="8.0.0-preview.7.23375.6" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0-rc.1.23419.4" />
     <PackageReference Include="PolySharp" Version="1.13.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>