KALAMAR_VERSION now in .env

Signed-off-by: Marc Kupietz <kupietz@ids-mannheim.de>
diff --git a/deliko-xl-compose.yml b/deliko-xl-compose.yml
index 7ab9b44..460e881 100644
--- a/deliko-xl-compose.yml
+++ b/deliko-xl-compose.yml
@@ -2,7 +2,7 @@
   example-index:
 services:
   kalamar:
-    image: "korap/kalamar:v0.62-DNB"
+    image: "korap/kalamar:${KALAMAR_VERSION}"
     ports:
       - "4000:64543"
     environment: