refactor: wait for background migrations task never changes anything

Signed-off-by: Norman Ziegner <norman.ziegner@ufz.de>

Author: Norman Ziegner

tasks/install.yml

@@ -99,7 +99,7 @@
   retries: 10
   delay: 10
   check_mode: no
-  changed_when: remaining.rc != 0
+  changed_when: false
   when:
     - file.stat.exists
     - file.stat.executable