Bump System.Device.Gpio in /samples/led-more-blinking-lights (#1951)

Bumps [System.Device.Gpio](https://github.com/dotnet/iot) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/dotnet/iot/releases)
- [Commits](2.1...2.2)

---
updated-dependencies:
- dependency-name: System.Device.Gpio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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samples/led-more-blinking-lights/led-more-blinking-lights.csproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Device.Gpio" Version="2.1.0" />
+    <PackageReference Include="System.Device.Gpio" Version="2.2.0" />
     <PackageReference Include="Iot.Device.Bindings" Version="2.1.0" />
   </ItemGroup>