chore(ci): update srtool

Author: ns212

.github/workflows/draft-release.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   build-runtimes:
-    runs-on: [self-hosted, linux]
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         runtime: ["interlay", "kintsugi"]