fix: ci idf.py not found

Author: laride

.github/workflows/build.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - main
+      - ci/*
   pull_request:
     branches:
       - main
@@ -92,7 +93,10 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Build current board
-        run: python scripts/release.py ${{ matrix.board }}
+        shell: bash
+        run: |
+          source $IDF_PATH/export.sh
+          python scripts/release.py ${{ matrix.board }}
 
       - name: Upload artifacts
         uses: actions/upload-artifact@v4