Update logger extra for sentry-logging

[thenav56]

Addresses

• https://github.com/the-deep/server/issues/1398

Changes

• Fix response.content not showing in sentry

Mention related users here if any.

This PR doesn't introduce any:

• [ ] temporary files, auto-generated files or secret keys
• [ ] n+1 queries
• [ ] flake8 issues
• [ ] print
• [ ] typos
• [ ] unwanted comments

This PR contains valid:

• [ ] tests
• [ ] permission checks (tests here too)
• [ ] translations

[thenav56]

Included this in https://github.com/the-deep/server/pull/1400