ci: Fix data fetching workflow

We accidentally broke the workflow in kata-containers#24 so this fixes that.

Signed-off-by: Aurélien Bombo <[email protected]>

Author: sprt

.github/workflows/fetch-ci-nightly-data.yaml

@@ -4,15 +4,13 @@ on:
   schedule:
     - cron: '0 4 * * *'
   workflow_dispatch:
-  on:
   push:
     branches:
       - main
     paths:
       - 'scripts/fetch-ci-nightly-data.js'
       - '.github/workflows/fetch-ci-nightly-data.yaml'
 
-
 jobs:
   fetch-and-commit-data:
     runs-on: ubuntu-22.04