update how lowercase is done

Author: finger563

action.yml

@@ -88,14 +88,16 @@ runs:
       working-directory: ${{ github.action_path }}
       shell: bash
       run: |
+        # save the runner OS to a variable in lower case
+        os_name=$(echo ${{ runner.os }} | tr '[:upper:]' '[:lower:]')
         # setup the python environment
         ${{ steps.id_python_310.outputs.python-path }} -m pip install -r requirements.txt
         # we need to clone v4.7.0 of esptool into the repo to ensure all of its data is properly packaged
         git clone --depth 1 --branch v4.7.0 https://github.com/espressif/esptool
         # now build the installer
         ${{ steps.id_python_310.outputs.python-path }} -m PyInstaller --clean programmer.spec
         # now actually make the artifact
-        artifact_name="${{ inputs.programmer-name }}_${{ env.version_str }}_${{ runner.os.lower() }}.bin"
+        artifact_name="${{ inputs.programmer-name }}_${{ env.version_str }}_${os_name}.bin"
         mv dist/programmer $artifact_name
         echo "artifactName=$artifact_name" >> "$GITHUB_ENV"