Bumps stack to version 9.1.0-SNAPSHOT (#221)

Author: elasticmachine

.github/workflows/report.yml

@@ -11,7 +11,7 @@ jobs:
   generate_report:
     runs-on: ubuntu-latest
     env:
-      STACK_VERSION: 9.0.0-SNAPSHOT
+      STACK_VERSION: 9.1.0-SNAPSHOT
       BRANCH: 'main' # Branch for downloading the specs
     steps:
       - uses: actions/checkout@v4