fix hash check

Author: jacdavi

m365/image/Dockerfile

@@ -26,7 +26,7 @@ COPY run_container.ps1 .
 
 ENV OPA_PATH="C:\app\opa_windows_amd64.exe"
 RUN Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v$($Env:OPA_VERSION)/opa_windows_amd64.exe -OutFile $Env:OPA_PATH -UseBasicParsing
-RUN if ((Get-FileHash $Env:OPA_PATH -Algorithm SHA256).Hash -ne (Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v$($Env:OPA_VERSION)/opa_windows_amd64.exe.sha256 -UseBasicParsing.Content)) { exit 1 }
+RUN if ((Get-FileHash $Env:OPA_PATH -Algorithm SHA256).Hash -ne ([System.Text.Encoding]::ASCII.GetString((Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v$($Env:OPA_VERSION)/opa_windows_amd64.exe.sha256 -UseBasicParsing).Content) -split " ")[0]) { exit 1 }
 RUN icacls.exe $env:OPA_PATH /grant "User Manager\ContainerUser":RX
 USER ContainerUser