Disable install

Author: Bart Koelman

appveyor.yml

@@ -42,7 +42,7 @@ for:
             # https://dotnet.github.io/docfx/tutorial/docfx_getting_started.html
             git checkout $env:APPVEYOR_REPO_BRANCH -q
         }
-        choco install docfx -y
+        #choco install docfx -y
   after_build:
     - pwsh: |
         CD ./docs
@@ -98,7 +98,7 @@ build_script:
 
     Write-Output "PostgreSQL version:"
     if ($IsWindows) {
-        Get-Childitem -Path "C:\Program Files\PostgreSQL" -Recurse
+        Get-Childitem -Path "C:\Program Files\PostgreSQL" -Recurse -ErrorAction SilentlyContinue -Include *.exe
         . "${env:ProgramFiles}\PostgreSQL\13.1\bin\psql" --version
     }
     else {