[Dependabot]: Bump System.Text.Json

Bumps [System.Text.Json](https://github.com/dotnet/runtime) from 6.0.6 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v6.0.6...v8.0.0)

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

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

src/NetSparkle/NetSparkle.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFrameworks>net8.0;net7.0;net6;net5;netstandard2.0;netcoreapp3.1;net452</TargetFrameworks>
@@ -109,29 +109,29 @@
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netcoreapp3.1'">
     <PackageReference Include="Microsoft.Win32.Registry" Version="6.0.0-preview.5.21301.5" />
-    <PackageReference Include="System.Text.Json" Version="6.0.6" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
     <!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
     <PackageReference Include="Microsoft.Win32.Registry" Version="6.0.0-preview.5.21301.5" />
-    <PackageReference Include="System.Text.Json" Version="7.0.3" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
 	<!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net5'">
     <PackageReference Include="Microsoft.Win32.Registry" Version="6.0.0-preview.5.21301.5" />
-    <PackageReference Include="System.Text.Json" Version="6.0.6" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
 	<!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net6'">
-    <PackageReference Include="System.Text.Json" Version="7.0.3" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
 	<!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
-	<PackageReference Include="System.Text.Json" Version="7.0.3" />
+	<PackageReference Include="System.Text.Json" Version="8.0.0" />
 	<!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-    <PackageReference Include="System.Text.Json" Version="8.0.0-rc.1.23419.4" />
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
     <!--<PackageReference Include="BouncyCastle.Cryptography" Version="2.0.0" /> TODO: 3.0 -->
   </ItemGroup>
   <ItemGroup>