Add in secp256k repo so that customer can build.

build.sh

@@ -129,12 +129,13 @@ if [ "$HELP" = true ]; then
     echo ""
     echo "Available NIPs:"
     echo "  001 - Basic Protocol (event creation, signing)"
+    echo "  004 - Encryption (legacy)"
     echo "  005 - DNS-based identifiers"
     echo "  006 - Key derivation from mnemonic"
     echo "  011 - Relay information document"
     echo "  013 - Proof of Work"
     echo "  019 - Bech32 encoding (nsec/npub)"
-    echo "  044 - Encryption"
+    echo "  044 - Encryption (modern)"
     echo ""
     echo "Examples:"
     echo "  $0                    # Auto-detect NIPs, build for current arch"