Add data exchange update to merge checklist

[Gold856]

Description

#884 says that PRs that update pipeline settings or anything related to data exchange should update the typing in the frontend as well, but that's not on the checklist. Add it to ensure we don't miss it.

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR addresses a bug, a regression test for it is added

[samfreund]

LGTM