fix: use non-semver dist tag for dwo generator (#780)

Signed-off-by: Mykhailo Kuznietsov <mkuznets@redhat.com>

.github/workflows/devworkspace-generator-publish-next.yml

@@ -44,7 +44,7 @@ jobs:
       run: |
         if [[ ${GITHUB_REF##*/} == "7."**".x" ]]; then
           echo "[INFO] using ${GITHUB_REF##*/} tag"
-          DIST_TAG="${GITHUB_REF##*/}-next"
+          DIST_TAG="next-${GITHUB_REF##*/}"
         else
           echo "[INFO] using "next" tag"
           DIST_TAG=next