Bump System.Text.Json from 8.0.5 to 9.0.9

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-version: 9.0.9
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

src/Cnblogs.DashScope.Core/Cnblogs.DashScope.Core.csproj

@@ -13,7 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.DeepDev.TokenizerLib" Version="1.3.3" />
-    <PackageReference Include="System.Text.Json" Version="8.0.6" />
+    <PackageReference Include="System.Text.Json" Version="9.0.9" />
   </ItemGroup>
 
 </Project>