update workflow

Author: yogh333

.github/workflows/build_all_rust_apps.yml

@@ -5,6 +5,14 @@ on:
   pull_request:
 
 jobs:
+    display_branch:
+        name: Display branch
+        runs-on: ubuntu-latest
+        steps:
+            - name: Display branch
+              run: |
+                echo "Branch:" ${{ github.ref }}
+                echo "Head ref:" ${{ github.head_ref }}
     test_build_rust:
         name: Build all Rust apps with the reusable workflow
         uses: LedgerHQ/ledger-device-rust-sdk/.github/workflows/reusable_build_all_apps.yml@y333/update_ci