Nikita Kalyanov 07dcf679de set content type explicitly (#3799) ...

I moved management API v2 to ogen and the generated code seems to be
more strict about content type. Let's set it properly as it is json
after all

## Describe your changes

## Issue ticket number and link

## Checklist before requesting a review
- [x] I have performed a self-review of my code.
- [ ] If it is a core feature, I have added thorough tests.
- [ ] Do we need to implement analytics? if so did you add the relevant
metrics to the dashboard?
- [ ] If this PR requires public announcement, mark it with
/release-notes label and add several sentences in this section.

2023-03-13 14:00:01 +02:00

..

init_pageserver.sh

set content type explicitly (#3799)

2023-03-13 14:00:01 +02:00

init_safekeeper.sh

set content type explicitly (#3799)

2023-03-13 14:00:01 +02:00