try shell bash

Author: umbynos

.github/workflows/release.yml

@@ -122,6 +122,7 @@ jobs:
           go-selfupdate arduino-create-agent${{ matrix.ext }} ${TAG_VERSION}
           echo %errorlevel%
           ls
+        shell: bash
         # if: steps.prerelease.outputs.IS_PRE != 'true'
 
       - name: Upload autoupdate files to Arduino downloads servers