Fix missing subscription for autopilot

[Elblinator]

Describe the bug
Finished polls and moderation notes are not displayed on the autopilot after a reload

How to Reproduce
(example with motion but it works for every poll)

1. in a meeting create a motion and project it
2. create a poll, start vote and publish it
3. navigate to the autopilot (the poll should be visible)
4. reload
5. the poll and moderation note should be gone
6. navigate to the motion and then to the LoS
7. navigate back to the autopilot
8. the poll and moderation note should be displayed

Expected behavior
A published poll and the moderation note should be displayed if they are available for being displayed

Additional information:
The autopilot_content:subscription is missing the polls (comparison to 4.1.14 and 4.1.15.staging)