Update some comments and links to match spec changes

Author: peacekeeper

src/main/java/uniresolver/driver/did/btcr2/crud/read/Read.java

@@ -26,7 +26,7 @@ public Read(BitcoinConnector bitcoinConnector, IPFSConnection ipfsConnection) {
     }
 
     /*
-     * 4.2 Read
+     * 7.2 Read
      */
 
     // See https://dcdpr.github.io/did-btcr2/#read

src/main/java/uniresolver/driver/did/btcr2/crud/read/ResolveInitialDocument.java

@@ -46,10 +46,10 @@ public ResolveInitialDocument(Read read, BitcoinConnector bitcoinConnector, IPFS
     }
 
     /*
-     * 4.2.1 Resolve Initial Document
+     * 7.2.1 Resolve Initial Document
      */
 
-    // See https://dcdpr.github.io/did-btcr2/#resolve-initial-document
+    // See https://dcdpr.github.io/did-btcr2/#resolve-initial-did-document
     public DIDDocument resolveInitialDIDDocument(DID identifier, IdentifierComponents identifierComponents, Map<String, Object> resolutionOptions, /* TODO: extra, not in spec */ Map<String, Object> didDocumentMetadata) throws ResolutionException {
         if (log.isDebugEnabled()) log.debug("resolveInitialDIDDocument ({}, {}, {})", identifier, identifierComponents, resolutionOptions);
 

src/main/java/uniresolver/driver/did/btcr2/crud/read/ResolveTargetDocument.java

@@ -53,7 +53,7 @@ public ResolveTargetDocument(Read read, BitcoinConnector bitcoinConnector, IPFSC
     }
 
     /*
-     * 4.2.2 Resolve Target Document
+     * 7.2.2 Resolve Target Document
      */
 
     // See https://dcdpr.github.io/did-btcr2/#resolve-target-document

src/main/java/uniresolver/driver/did/btcr2/syntax/DidBtcr2IdentifierDecoding.java

@@ -18,7 +18,7 @@ public class DidBtcr2IdentifierDecoding {
     private static final Logger log = LoggerFactory.getLogger(DidBtcr2IdentifierDecoding.class);
 
     /*
-     * 3.3 did:btcr2 Identifier Decoding
+     * 4.3 did:btcr2 Identifier Decoding
      */
 
     // See https://dcdpr.github.io/did-btcr2/#didbtcr2-identifier-decoding

src/main/java/uniresolver/driver/did/btcr2/syntax/DidBtcr2IdentifierEncoding.java

@@ -20,7 +20,7 @@ public class DidBtcr2IdentifierEncoding {
     private static final Logger log = LoggerFactory.getLogger(DidBtcr2IdentifierEncoding.class);
 
     /*
-     * 3.2 did:btcr2 Identifier Encoding
+     * 4.2 did:btcr2 Identifier Encoding
      */
 
     // See https://dcdpr.github.io/did-btcr2/#didbtcr2-identifier-encoding