Update 2 nuget dependencies

Author: github-actions[bot]

System.Device.Spi/System.Device.Spi.nfproj

@@ -60,11 +60,11 @@
       <Private>True</Private>
     </Reference>
     <Reference Include="nanoFramework.Runtime.Events, Version=1.9.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.2-preview.5\lib\nanoFramework.Runtime.Events.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.Runtime.Events.1.9.2-preview.8\lib\nanoFramework.Runtime.Events.dll</HintPath>
       <Private>True</Private>
     </Reference>
     <Reference Include="System.Device.Gpio, Version=1.0.2.0, Culture=neutral, PublicKeyToken=c07d481e9758c731">
-      <HintPath>..\packages\nanoFramework.System.Device.Gpio.1.0.2-preview.5\lib\System.Device.Gpio.dll</HintPath>
+      <HintPath>..\packages\nanoFramework.System.Device.Gpio.1.0.2-preview.7\lib\System.Device.Gpio.dll</HintPath>
       <Private>True</Private>
     </Reference>
   </ItemGroup>

System.Device.Spi/packages.config

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
   <package id="nanoFramework.CoreLibrary" version="1.10.5" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.Runtime.Events" version="1.9.2-preview.5" targetFramework="netnanoframework10" />
-  <package id="nanoFramework.System.Device.Gpio" version="1.0.2-preview.5" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.Runtime.Events" version="1.9.2-preview.8" targetFramework="netnanoframework10" />
+  <package id="nanoFramework.System.Device.Gpio" version="1.0.2-preview.7" targetFramework="netnanoframework10" />
   <package id="Nerdbank.GitVersioning" version="3.4.194" developmentDependency="true" targetFramework="netnanoframework10" />
 </packages>