CI: fix missing cache timestamps
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b2a8cbd..534c233 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -118,5 +118,6 @@
     - end_section setup_ssh
   script:
     - start_section korapxmlu "Uploading index to KorAP4DNB instance"
+    - touch target/dnb.index.tar.xz
     - make deploy
     - end_section deploy