refactor: renaming scheduled to nightly

Author: dlachaume

.github/workflows/scheduled-docker-builds.yml renamed to .github/workflows/nightly-docker-builds.yml

@@ -1,12 +1,12 @@
-name: Scheduled Docker Builds
+name: Nightly Docker Builds
 
 on:
   schedule:
     - cron: "0 2 * * *"
   workflow_dispatch:
 
 jobs:
-  docker-scheduled-build:
+  nightly-docker-build:
     runs-on: ubuntu-22.04
     strategy:
       fail-fast: false