ci: display previous tag during release job (#880)

.github/workflows/release.yml

@@ -105,6 +105,7 @@ jobs:
           fi
           echo $REGEX
           PREV_TAG=$(git tag --sort=-creatordate | grep -P $REGEX || true | head -1)
+          echo $PREV_TAG
           if [ "$TAG" == "$PREV_TAG" ]; then
             echo "No new version to release"
             exit 1