Bump System.Text.Json in /src/NuGet/ColonesExchangeRate

Bumps System.Text.Json from 7.0.3 to 8.0.4.

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

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

src/NuGet/ColonesExchangeRate/ColonesExchangeRate.csproj

@@ -31,6 +31,6 @@
     </None>
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Version="7.0.3" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 </Project>