Change trigger_devel workflow to midday every week day

Cron is configured to run every night on a daily basis which is
great. However, this has potential to break all the SV pipelines
as a commit that gets merged to EIB will result in a new image
build without the SV team have chance to validate and reflect the
change to SV.

This commit configures trigger_devel workflow to run midday every
week day so the SV team can make the necessary validations and
updates accordingly.

Please note that this should be considered as a temporary fix and
an automated way to bring new EIB versions to SV should be developed
collaboratively.

.gitea/workflows/trigger_devel.yaml

@@ -1,7 +1,8 @@
 name: Trigger Devel Packages
 on:
+  # NOTE (fdegir): Cron is set to run midday every weekday
   schedule:
-    - cron: "@daily"
+    - cron: "0 12 * * 1-5
 
 jobs:
   sync-pr-project:
@@ -27,4 +28,4 @@ jobs:
           ref: 'devel'
       - name: "Trigger packages"
         run: |
-          python3 .obs/trigger_package.py
+          python3 .obs/trigger_package.py