chore: add release tag for npm

Signed-off-by: Tomas Weiss <tomas.weiss2@gmail.com>

Author: tomkis

.github/workflows/release.yml

@@ -158,4 +158,4 @@ jobs:
 
       - name: Publish TS SDK
         working-directory: apps/agentstack-sdk-ts
-        run: npm publish
+        run: npm publish --tag rc