Update sims-045.yml

Author: iKapitonau

.github/workflows/sims-045.yml

@@ -1,11 +1,7 @@
 name: Sims release/0.45.x
 # Sims workflow runs multiple types of simulations (nondeterminism, import-export, after-import, multi-seed-short)
 # This workflow will run on all Pull Requests, if a .go, .mod or .sum file have been changed
-on:
-  schedule:
-    - cron: "0 0,12 * * *"
-  release:
-    types: [published]
+on: workflow_dispatch
 
 concurrency:
   group: ci-${{ github.ref }}-sims-045