fix formating issue 3

Author: jrakibi

decoding/inputs-prev-txid.mdx

@@ -137,9 +137,9 @@ This difference in segwit transactions was intentionally designed to prevent tra
 <ExpandableAlert title="Historical Note" type="info">
 There was a unique situation in Bitcoin's history where duplicate TXIDs occurred in blocks 91,722 and 91,880. This led to:
 
-1. BIP 30: Preventing blocks from containing duplicate TXIDs
-2. BIP 34: Requiring coinbase transactions to include block height in their data.
-
+- BIP 30: Preventing blocks from containing duplicate TXIDs
+- BIP 34: Requiring coinbase transactions to include block height in their data
+    
 </ExpandableAlert>
 
 ## Implementation Details