Update .NET version in appveyor.yml

Author: snakefoot

appveyor.yml

@@ -11,7 +11,7 @@ matrix:
 install:
 - ps: |
     Invoke-WebRequest -Uri 'https://dot.net/v1/dotnet-install.ps1' -UseBasicParsing -OutFile "$env:temp\dotnet-install.ps1"
-    & $env:temp\dotnet-install.ps1 -Architecture x64 -Version '10.0.100' -InstallDir "$env:ProgramFiles\dotnet"
+    & $env:temp\dotnet-install.ps1 -Architecture x64 -Version '10.0.102' -InstallDir "$env:ProgramFiles\dotnet"
 build:
   publish_nuget: true
   publish_nuget_symbols: true