chore: add DCO to release-please

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

.github/workflows/release-please.yml

@@ -14,6 +14,7 @@ jobs:
         id: release
         with:
           token: ${{secrets.RELEASE_PLEASE_ACTION_TOKEN}}
+          signoff: "OpenFeature Bot <[email protected]>"
 
       # The logic below handles the maven publication:
       - name: Checkout Repository