Bump System.Text.Json in /2_Libs/Libraries/CreateNuGet/SampleLib

Bumps System.Text.Json from 7.0.0 to 8.0.4.

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-type: direct:production
...

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

Author: dependabot[bot]

2_Libs/Libraries/CreateNuGet/SampleLib/SampleLib.csproj

@@ -45,7 +45,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' != 'netstandard2.0'">
-    <PackageReference Include="System.Text.Json" Version="7.0.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 
 </Project>