Discrepancy in ChainIndexer documentation between docs and GH

[rjan90]

There is currently a discrepancy between the ChainIndexer documentation available on GitHub and the documentation on lotus.filecoin.io. This inconsistency can lead to confusion for users. The ChainIndexer documentation should be reviewed and updated to ensure consistency, especially following the release of Lotus v1.31.0 which released the new ChainIndexer.

• https://github.com/filecoin-project/lotus/blob/24698c5886ab3cd284cbfc15aad97b4925ddd0ff/documentation/en/chain-indexer-overview-for-operators.md#backfill
• https://github.com/filecoin-project/lotus/blob/master/documentation/en/chain-indexer-overview-for-operators.md