Bump System.Device.Gpio in /samples/led-more-blinking-lights (#2113)

Bumps [System.Device.Gpio](https://github.com/dotnet/iot) from 2.2.0 to 3.0.0.
- [Release notes](https://github.com/dotnet/iot/releases)
- [Commits](https://github.com/dotnet/iot/compare/2.2...3.0)

---
updated-dependencies:
- dependency-name: System.Device.Gpio
  dependency-type: direct:production
  update-type: version-update:semver-major
...
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Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

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

-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Device.Gpio" Version="2.2.0" />
+    <PackageReference Include="System.Device.Gpio" Version="3.0.0" />
     <PackageReference Include="Iot.Device.Bindings" Version="2.2.0" />
   </ItemGroup>