Update powershell-pr-check.yml

Author: MathiasVP

.github/workflows/powershell-pr-check.yml

@@ -25,8 +25,8 @@ jobs:
           channel: release
       - name: Install PowerShell
         run: |
-          Get-Command codeql
-          ./powershell/build.ps1
+          $path = Split-Path (Get-Command codeql).Source
+          ./powershell/build.ps1 $path
       - name: Run QL tests
         run: |
           codeql test run --threads=0 powershell/ql/test