Ensure docs are pushed to the gh-pages branch

Author: natemcmaster

.appveyor.yml

@@ -1,14 +1,15 @@
 build_script:
   - ps: iwr https://get.dot.net/v1/dotnet-install.ps1 -out dotnet-install.ps1; ./dotnet-install.ps1 -Version 2.2.100
   - ps: .\docs\generate.ps1 -Verbose
+  - ps: .\docs\push.ps1 -AppVeyor
 environment:
   global:
     DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
     DOTNET_CLI_TELEMETRY_OPTOUT: 1
+  GITHUB_ACCESS_TOKEN:
+    secure: 7gza5cyC0Fwp5LcFPz9dGMcHXP2jxbrnu7er9R/HkdvnhzGJVADvOtfYO7+Vow5p
 test: off
 os: Visual Studio 2017
 branches:
   only:
     - master
-after_deploy:
-  - ps: .\docs\push.ps1 -AppVeyor