Edited ch02_overview.adoc with Atlas code editor

ch02_overview.adoc

@@ -190,7 +190,7 @@ image::images/mbc3_0203.png["Transaction Double-Entry"]
 
 ==== Transaction Chains
 
-Alice's ((("transaction chains", id="transaction-chain-ch2")))payment to Bob's Store uses a
+Alice's ((("transaction chains", id="transaction-chain-example")))payment to Bob's Store uses a
 previous transaction's output as its input. In the previous chapter,
 Alice received bitcoins from her friend Joe in return for cash.
 We've labeled that as _Transaction 1_ (Tx1) in <<transaction-chain>>.
@@ -243,7 +243,7 @@ created, this unit didn't have a name and some developers simply called
 it the _base unit._  Later many users began calling this unit a
 _satoshi_ (sat) in honor of Bitcoin's creator.  In <<transaction-chain>>
 and some other illustrations in this book, we use satoshi values because
-that's what the protocol itself ((("satoshis")))((("transaction chains", id="transaction-chain-ch2")))uses.
+that's what the protocol itself ((("satoshis")))((("transaction chains", id="transaction-chain-example")))uses.
 ====
 
 ==== Making Change