nuget-deps: bump System.Text.Json from 7.0.3 to 8.0.0 in /src/Notepads (

#1273)

Bumps [System.Text.Json](https://github.com/dotnet/runtime) from 7.0.3 to 8.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v7.0.3...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]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Notepads/Notepads.csproj

@@ -435,7 +435,7 @@
       <Version>13.0.3</Version>
     </PackageReference>
     <PackageReference Include="System.Text.Json">
-      <Version>7.0.3</Version>
+      <Version>8.0.0</Version>
     </PackageReference>
     <PackageReference Include="UTF.Unknown">
       <Version>2.5.1</Version>