chore(relup): download relup base version packages from s3

scripts/relup-build/download-base-packages.sh

@@ -14,7 +14,7 @@ export PROFILE
 
 case $PROFILE in
     "emqx-enterprise")
-        DIR='enterprise'
+        DIR='emqx-ee'
         EDITION='enterprise'
         ;;
     "emqx")
@@ -51,7 +51,7 @@ mkdir -p _upgrade_base
 pushd _upgrade_base >/dev/null
 for tag in ${BASE_VERSIONS}; do
     filename="$PROFILE-$(fullvsn "${tag#[e|v]}").tar.gz"
-    url="https://www.emqx.com/downloads/$DIR/$tag/$filename"
+    url="https://packages.emqx.io/$DIR/$tag/$filename"
     echo "downloading ${filename} ..."
     ## if the file does not exist (not downloaded yet)
     ## and there is such a package to downlaod