Update ouroboros-consensus-cardano/tools/db-analyser/Documentation.md

Co-authored-by: Javier Sagredo <javier.sagredo@iohk.io>

ouroboros-consensus-cardano/tools/db-analyser/Documentation.md

@@ -47,7 +47,7 @@ db-analyser will get quite noisy
 
 ### --only-immutable-db
 
-By default db-analyser will process all blocks from the current chain. That is from the genesis up to the current tip. In order to this it must first properly initialize the whole ChainDB. That means that before it even starts processing blocks it will first:
+By default db-analyser will process all blocks from the current chain. That is from the genesis up to the current tip. In order to do this it must first properly initialize the whole ChainDB. That means that before it even starts processing blocks it will:
 
 1. look for latest snapshot stored in DB_PATH/ledger
 2. load that snapshot into memory