docs: Remove `default_dock_anchor` in `configuring-zed.md` (#18210)

Removed the deprecated option `default_dock_anchor` in
`configuring-zed.md`

Note: https://zed.dev/blog/new-panel-system

Release Notes:

- N/A

Junseong Park committed 1y ago

bb7d9d35256825c9b022a3c89c556c1521664c8d

Parent: 75cb199

Committed by GitHub <noreply@github.com> on 9/23/2024, 3:26:01 AM