chore(deps): update ovn-org/ovn digest to ef8f5c1

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Dockerfile

@@ -41,7 +41,7 @@ RUN apt-get update && \
         openssl \
         python3 \
         quilt
-ARG OVN_COMMIT=4fa78fa1f9316f23b138f58e7657030596fb0f9d
+ARG OVN_COMMIT=ef8f5c1ac63e8094eaf13507013e310991db45a2
 ADD https://github.com/ovn-org/ovn.git#${OVN_COMMIT} /src/ovn
 WORKDIR /src/ovn/ovs
 RUN --network=none ./boot.sh