Fix not detecting rc release in sign and package

.github/workflows/cicd.yml

@@ -345,7 +345,7 @@ jobs:
 
                   # Determine if this is an RC release
                   IS_RC="false"
-                  if echo "$TAG" | grep -qE "rc[0-9]+$"; then
+                  if [[ "$TAG" == *"-rc."* ]]; then
                       IS_RC="true"
                   fi