add shell (#39)

Signed-off-by: Tom Hennen <[email protected]>

Author: TomHennen

actions/vsa_creator/action.yml

@@ -45,6 +45,7 @@ runs:
           git fetch origin "refs/notes/*:refs/notes/*"
           git notes append -F ${{ github.workspace }}/metadata/signed_vsa.json
           git push origin "refs/notes/*"
+      shell: bash
     - uses: actions/upload-artifact@v4
       if: always()
       with: