Bump System.Text.Json from 10.0.2 to 10.0.3

---
updated-dependencies:
- dependency-name: System.Text.Json
  dependency-version: 10.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Akismet.Net/Akismet.Net.csproj

@@ -27,7 +27,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Version="10.0.2" />
+    <PackageReference Include="System.Text.Json" Version="10.0.3" />
     <PackageReference Include="System.Net.Http" Version="4.3.4" />
     <PackageReference Condition="'$(TargetFramework)' == 'netstandard2.0'" Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.102">