Fix env var to use bash syntax, instead of pwsh for windows exe upload (#16972)

Author: cmmarslender

.github/workflows/build-windows-installer.yml

@@ -374,7 +374,7 @@ jobs:
       run: |
         py3createtorrent -f -t udp://tracker.opentrackr.org:1337/announce "${GITHUB_WORKSPACE}"/chia-blockchain-gui/release-builds/windows-installer/ChiaSetup-${{ env.CHIA_INSTALLER_VERSION }}.exe -o "${GITHUB_WORKSPACE}"/chia-blockchain-gui/release-builds/windows-installer/ChiaSetup-${{ env.CHIA_INSTALLER_VERSION }}.exe.torrent --webseed https://download.chia.net/install/ChiaSetup-${{ env.CHIA_INSTALLER_VERSION }}.exe
         ls
-        gh release upload --repo ${{ github.repository }} $env:RELEASE_TAG "${GITHUB_WORKSPACE}"/chia-blockchain-gui/release-builds/windows-installer/ChiaSetup-${{ env.CHIA_INSTALLER_VERSION }}.exe.torrent
+        gh release upload --repo ${{ github.repository }} $RELEASE_TAG "${GITHUB_WORKSPACE}"/chia-blockchain-gui/release-builds/windows-installer/ChiaSetup-${{ env.CHIA_INSTALLER_VERSION }}.exe.torrent
 
     - name: Upload Dev Installer
       if: steps.check_secrets.outputs.HAS_AWS_SECRET && github.ref == 'refs/heads/main'