fixed formatting

Author: github-actions[bot]

docs/index.md

@@ -18,18 +18,18 @@ been revised and are in a fairly complete state._
 
 ### PART TWO: SENDING TRANSACTIONS
 
-* [**3.0: Preparing Your Bitcoin Wallet](03_0_Preparing_Your_Bitcoin_Wallet.md**)
+* [**3.0: Preparing Your Bitcoin Wallet**](03_0_Preparing_Your_Bitcoin_Wallet.md)
     * [3.1: Verifying Your Bitcoin Setup](03_1_Verifying_Your_Bitcoin_Setup.md)
     * [3.2: Knowing Your Bitcoin Setup](03_2_Knowing_Your_Bitcoin_Setup.md)
     * [3.3: Setting Up Your Wallet](03_3_Setting_Up_Your_Wallet.md) 
     * [3.4: Understanding the Descriptor Wallet](03_4_Understanding_the_Descriptor_Wallet.md)
-* [**4.0: Preparing Your Bitcoin Addresses](04_0_Preparing_Your_Bitcoin_Addresses.md**)
+* [**4.0: Preparing Your Bitcoin Addresses**](04_0_Preparing_Your_Bitcoin_Addresses.md)
     * [4.1: Understanding the Address](04_1_Understanding_the_Address.md)
     * [4.2: Integrating Addresses and Descriptors](04_2_Integrating_Addresses_Descriptors.md)
     * [4.3: Creating QR Codes for Addresses](04_3Creating_QR_Codes_for_Addresses.md)
     * [4.4: Receiving a Transaction](04_4_Receiving_a_Transaction.md)
         * [Interlude: Using Command-Line Variables](04_4a_Interlude_Using_Command-Line_Variables.md)
-* [**5.0: Sending Bitcoin Transactions](05_0_Sending_Bitcoin_Transactions.md**) 
+* [**5.0: Sending Bitcoin Transactions**](05_0_Sending_Bitcoin_Transactions.md) 
     * [5.1: Sending Coins the Easy Way](05_1_Sending_Coins_The_Easy_Way.md) 
     * [5.2: Creating a Raw Transaction](05_2_Creating_a_Raw_Transaction.md) 
         * [Interlude: Using JQ](05_2a_Interlude_Using_JQ.md) 
@@ -38,7 +38,7 @@ been revised and are in a fairly complete state._
         * [Interlude: Using Curl](05_4a_Interlude_Using_Curl.md)
     * [5.5: Sending Coins with Automated Raw Transactions](05_5_Sending_Coins_with_Automated_Raw_Transactions.md)
     * [5.6: Sending Other Types of Transactions](05_6_Sending_Coins_to_Other_Addresses.md) 
-* [**6.0: Controlling Bitcoin Transactions](06_0_Controlling_Bitcoin_Transactions.md**)
+* [**6.0: Controlling Bitcoin Transactions**](06_0_Controlling_Bitcoin_Transactions.md)
     * [6.1 Watching for Stuck Transactions](06_1_Watching_for_Stuck_Transactions.md)
     * [6.2: Resending a Transaction with RBF](06_2_Resending_a_Transaction_with_RBF.md)
     * [6.3: Funding a Transaction with CPFP](06_3_Funding_a_Transaction_with_CPFP.md)