fix: update release workflow to use correct build_zipapp.py path

- Changed path from build_zipapp.py to tools/build_zipapp.py
- Fixes build failure after reorganizing tools directory

Author: sturrent

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
         python-version: '3.10'
 
     - name: Build zipapp
-      run: python build_zipapp.py
+      run: python tools/build_zipapp.py
 
     - name: Verify build
       run: |