Bump OxyPlot.WindowsForms and OxyPlot.Core in /LibreHardwareMonitor (#1449)

Bumps [OxyPlot.WindowsForms](https://github.com/oxyplot/oxyplot) and [OxyPlot.Core](https://github.com/oxyplot/oxyplot). These dependencies needed to be updated together.

Updates `OxyPlot.WindowsForms` from 2.1.2 to 2.2.0
- [Release notes](https://github.com/oxyplot/oxyplot/releases)
- [Changelog](https://github.com/oxyplot/oxyplot/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/oxyplot/oxyplot/commits)

Updates `OxyPlot.Core` from 2.1.2 to 2.2.0
- [Release notes](https://github.com/oxyplot/oxyplot/releases)
- [Changelog](https://github.com/oxyplot/oxyplot/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/oxyplot/oxyplot/commits)

---
updated-dependencies:
- dependency-name: OxyPlot.WindowsForms
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: OxyPlot.Core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

LibreHardwareMonitor/LibreHardwareMonitor.csproj

@@ -23,8 +23,8 @@
   <ItemGroup>
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="TaskScheduler" Version="2.11.0" />
-    <PackageReference Include="OxyPlot.Core" Version="2.1.2" />
-    <PackageReference Include="OxyPlot.WindowsForms" Version="2.1.2" />
+    <PackageReference Include="OxyPlot.Core" Version="2.2.0" />
+    <PackageReference Include="OxyPlot.WindowsForms" Version="2.2.0" />
     <PackageReference Include="System.Management" Version="8.0.0" />
   </ItemGroup>
   <ItemGroup>