Remove scheduled pixi auto-update and add scheduled build with latest dependencies

.github/workflows/pixi-auto-update-ci.yml

@@ -1,9 +1,6 @@
 name: Pixi auto update
 
 on:
-  # At 00:00 of every monday
-  schedule:
-    - cron: "0 0 * * 1"
   # on demand
   workflow_dispatch:
 

.github/workflows/pixi-ci.yml

@@ -1,7 +1,18 @@
 name: CI Workflow
 
 on:
+  # on demand
+  workflow_dispatch:
+    inputs:
+      delete_pixi_lock:
+        description: 'If true, delete pixi.lock, to test against the latest version of dependencies.'
+        required: true
+        default: 'false'
   pull_request:
+  schedule:
+  # * is a special character in YAML so you have to quote this string
+  # Execute a "nightly" build twice a week 2 AM UTC
+  - cron:  '0 2 * * 2,5'
 
 jobs:
   build-with-pixi:
@@ -16,6 +27,15 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
+    # On periodic jobs and when delete_pixi_lock option is true, delete the pixi.lock to check that the project compiles with latest version of dependencies
+    - name: Delete pixi.lock on scheduled jobs or if delete_pixi_lock is true
+      if: github.event_name == 'schedule' || (github.event_name == 'workflow_dispatch' && github.event.inputs.delete_pixi_lock == 'true')
+      shell: bash
+      run: |
+        rm -rf pixi.lock
+        pixi list
+        cat pixi.lock
+
     - name: Print used environment
       shell: bash
       run: |