Fix Windows S3 upload

.github/workflows/windows_release.yml

@@ -101,7 +101,7 @@ jobs:
         run: |
               aws configure set aws_access_key_id ${{ secrets.AWS_ACCESS_KEY_ID }}
               aws configure set aws_secret_access_key ${{ secrets.AWS_SECRET_ACCESS_KEY }}
-              aws s3 cp ${ARTIFACT} s3://qgroundcontrol/builds/${{ env.GIT_BRANCH_NAME }}/${{ env.ARTIFACT }} --region us-west-2 --acl public-read
+              aws s3 cp ${ARTIFACT} s3://qgroundcontrol/builds/${GIT_BRANCH_NAME}/${{ env.ARTIFACT }} --region us-west-2 --acl public-read
 
       - name: Upload tagged stable build to S3 latest Bucket
         if:                 github.event_name == 'push' && github.ref_type == 'tag'