Bump System.Text.Json from 6.0.1 to 8.0.4 in /src/Kevsoft.WLED

Bumps System.Text.Json from 6.0.1 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]

src/Kevsoft.WLED/Kevsoft.WLED.csproj

@@ -24,7 +24,7 @@
 
   <ItemGroup>
     <PackageReference Include="System.Net.Http.Json" Version="6.0.0" />
-    <PackageReference Include="System.Text.Json" Version="6.0.1" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
   </ItemGroup>
 
 </Project>