ci: not upload bundle result for release build

Signed-off-by: Zxilly <zxilly@outlook.com>

Author: Zxilly

.github/workflows/build-webui.yml

@@ -9,7 +9,7 @@ on:
         required: true
     secrets:
       CODECOV_TOKEN:
-        required: true
+        required: false
 
 permissions:
   contents: read