checkout the branch we are using

Author: Jason2866

.github/workflows/build_esptool.yml

@@ -164,6 +164,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+        with:
+          ref: master_pio
         if: startsWith(github.ref, 'refs/tags/')
       - name: Download artifacts
         uses: actions/download-artifact@v4