Bump System.Text.Json from 9.0.6 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-patch
...

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

Author: dependabot[bot]

src/SharedMauiCoreLibrary.Test/SharedMauiCoreLibrary.Test.csproj

@@ -24,7 +24,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="System.Text.Json" Version="9.0.6" />
+    <PackageReference Include="System.Text.Json" Version="9.0.9" />
   </ItemGroup>
 
   <ItemGroup>