Update bip-0077.md

Author: crStiv

bip-0077.md

@@ -314,7 +314,7 @@ PjV2MsgA Byte Representation (7168 bytes total)
 
 The resulting HPKE payload is the body of a POST request to the
 receiver's mailbox. This request is then [
-encapsulated](#client-directory-interactions) according to
+encapsulated](#clientdirectory-interactions) according to
 Oblivious HTTP to the directory's OHTTP Gateway. OHTTP serializes the
 inner request as BHTTP, and provides another layer of HPKE encryption,
 between the client and directory.
@@ -397,7 +397,7 @@ PjV2MsgB Byte Representation (7168 bytes total)
 
 The receiver makes the resulting HPKE payload the body of a POST request to the
 sender's mailbox whose Short ID is derived from the sender's reply key. This request is then [
-encapsulated](#client-directory-interactions) according to
+encapsulated](#clientdirectory-interactions) according to
 Oblivious HTTP to the directory's OHTTP Gateway. OHTTP serializes the
 inner request as BHTTP, and provides another layer of HPKE encryption,
 between the client and directory.