Bump UnitsNet from 5.55.0 to 5.56.0 in /server

Bumps [UnitsNet](https://github.com/angularsen/UnitsNet) from 5.55.0 to 5.56.0.
- [Release notes](https://github.com/angularsen/UnitsNet/releases)
- [Commits](angularsen/UnitsNet@UnitsNet/5.55.0...UnitsNet/5.56.0)

---
updated-dependencies:
- dependency-name: UnitsNet
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

server/SensorServer/SensorServer.csproj

@@ -15,7 +15,7 @@
         </PackageReference>
         <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.7" />
         <PackageReference Include="Swashbuckle.AspNetCore" Version="6.7.0" />
-        <PackageReference Include="UnitsNet" Version="5.55.0" />
+        <PackageReference Include="UnitsNet" Version="5.56.0" />
     </ItemGroup>
 
 </Project>