Fix broken link in doc (#7094)

The doc in
[dupsort.md](https://github.com/ledgerwatch/erigon/blob/devel/docs/programmers_guide/dupsort.md#erigon)
points to a non-existent `AbstractKV.md`

As best as I can tell, the `AbstractKV.md` was reworked and renamed in
commit

0bc61c06ed

then, this was later moved into erigon-lib. This commit simply repoints
the doc at this new location.

Co-authored-by: Jason Yellick <jason@enya.ai>
This commit is contained in:
Jason Yellick 2023-03-13 20:03:09 -04:00 committed by GitHub
parent aec1dcdeef
commit 4f6d76928a
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@ -153,7 +153,8 @@ Erigon
This article target is to show tricky concepts on examples. Future
reading [here](./db_walkthrough.MD#table-history-of-accounts)
Erigon supports multiple typed cursors, see [AbstractKV.md](./../../ethdb/AbstractKV.md)
Erigon supports multiple typed cursors, see the [KV
Readme.md](https://github.com/ledgerwatch/erigon-lib/tree/main/kv)