Revert "CI: use hyphen instead of underscore in device suffix"

This would break OTA in current WAS version. We shouldn't do this until
we release a new WAS version.

This reverts commit 816eb71.

.github/workflows/build-willow.yml

@@ -17,8 +17,8 @@ jobs:
     strategy:
       matrix:
         device:
-          - ESP32-S3-BOX
-          - ESP32-S3-BOX-LITE
+          - ESP32_S3_BOX
+          - ESP32_S3_BOX_LITE
     runs-on: ubuntu-22.04
     container:
       image: ${{ inputs.container-image }}
@@ -63,7 +63,7 @@ jobs:
         run: ( . "$IDF_PATH/export.sh"; ./utils.sh setup )
         shell: bash
       - name: append device type to sdkconfig
-        run: echo "CONFIG_${{ matrix.device }}_BOARD=y" | sed 's/-/_/g' >> sdkconfig
+        run: echo "CONFIG_${{ matrix.device }}_BOARD=y" >> sdkconfig
       - name: ./utils.sh build
         run: ( . "$IDF_PATH/export.sh"; ./utils.sh build )
         shell: bash