Minor fix in release.yml to export PUSH_LATEST

Author: ganeshmurthy

.github/workflows/release.yml

@@ -44,7 +44,7 @@ jobs:
           # Query github to see if this VERSION is the latest
           LATEST_RELEASE_TAG=`curl -s https://api.github.com/repos/skupperproject/skupper-router/releases/latest  | jq -r ".tag_name"`
           LATEST_VERSION=`(echo "${VERSION}" ; echo "${LATEST_RELEASE_TAG}" ) | sort -V | tail -n1`
-          [[ "${VERSION}" = "${LATEST_VERSION}" ]] && PUSH_LATEST=true || unset PUSH_LATEST
+          [[ "${VERSION}" = "${LATEST_VERSION}" ]] && export PUSH_LATEST=true || unset PUSH_LATEST
 
           export PLATFORM=amd64
           ./.github/scripts/image.sh