CI: rebuild deps cache from the main branch nightly (#532)

Caches generated from other branches are not cross-accessible, so it has to be done from the main branch

Signed-off-by: Evgeny Malygin <[email protected]>

.github/workflows/dependencies.yaml

@@ -6,6 +6,10 @@ on:
       cache_key:
         description: "GH Actions Cache key associated with the built dependencies"
         value: ${{ jobs.build_dependencies.outputs.cache_key }}
+  schedule:
+    # Rebuild dependencies cache from the "main" branch at the beginning of a new day,
+    # so it is accessible from other branches' PRs
+    - cron: "10 0 * * *"
 
 concurrency:
   group: deps-${{ github.workflow }}-${{ github.head_ref || github.run_id }}