Change if statement to match powershell syntax

Author: EmilKWarmdahl

.github/workflows/release.yaml

@@ -105,7 +105,7 @@ jobs:
       - name: Check if version exist in s3
         run: |
           set +e
-          output=$(aws s3 ls "${{ env.OUTFILE }}")
+          $output=aws s3 ls "${{ env.OUTFILE }}"
           ec=$?
           if ( $ec -eq "0" ){
               echo "Objects found ${{ env.OUTFILE }}"