update workflow

Author: tobiasjaster

.github/workflows/build.yaml

@@ -18,11 +18,12 @@ jobs:
           path: './zephyr_workspace/application'
           submodules: 'true'
       - name: link custom boards
-        working-directory: ./zephyr_workspace/custom_boards
+        working-directory: ./zephyr_workspace/application/custom_boards
         run: |
+          ls -lap
           ./link.sh
       - name: initialize west
-        working-directory: ./zephyr_workspace
+        working-directory: ./workspace/zephyr_workspace
         run: |
           west update
           west zephyr-export