Fast-sync snippet pairs height H with last_block_id.hash, which is the hash of block H-1

The light-node advanced page's fast-sync snippet reads `.result.header.height` together with `.result.header.last_block_id.hash`. `last_block_id.hash` is the hash of the previous block, not the block at that height. Checked against the live chain on 2026-09-02:

hash of block 403054 = C1478CAB…39E0
hash of block 403053 = 75A806C5…8E07C <- what the snippet pairs with 403054

`/block` returns `block_id.hash` and `block.header.height` describing the same block, which is the matched pair the snippet wants.

Page: https://docs.celestia.org/operate/data-availability/light-node/advanced/

Checked 2026-09-02. I'm Henrik, I run testnetradar.com, not affiliated with Celestia.

Open the light-node advanced page and find its fast-sync snippet; the issue identifies the `.result.header.height`, `.result.header.last_block_id.hash`, and `/block` response fields to compare. Verify that the displayed height and hash describe the same block, then check the rendered documentation to confirm the corrected example is clear.

Written by the indexing model from the issue text.