fix(build-and-push): use real ssh user in docker context URL (was literal '***')

build-and-push/action.yaml

@@ -128,7 +128,7 @@ runs:
 
         docker context rm -f remote-builder 2>/dev/null || true
         docker context create remote-builder \
-          --docker "host=ssh://***@${BUILDER_HOST}"
+          --docker "host=ssh://${BUILDER_USER}@${BUILDER_HOST}"
 
         # Ensure qemu/binfmt is registered on the remote for cross-arch builds.
         # This registration lives in the kernel and is lost on daemon/host