fix(imagebuilder): upgrade pack version

Author: duanhongyi

rootfs/Dockerfile

@@ -6,7 +6,7 @@ ENV DRYCC_UID=1001 \
   PODMAN_VERSION="4.0.3" \
   MC_VERSION="2022.04.01.23.44.48" \
   CADDY_VERSION="2.4.6" \
-  PACK_VERSION="0.25.0" \
+  PACK_VERSION="0.26.0" \
   GOSU_VERSION="1.14"
 
 RUN groupadd drycc --gid ${DRYCC_GID} \