Update lingo: multiaddr “items” → “components”

Co-Authored-By: Steven Allen <steven@stebalien.com>

Author: ntninja

README.md

@@ -106,7 +106,7 @@ TODO: specify the decoding (string to byte-array) procedure
 
 ### Codecs
 
-Depending on the protocol of a Multiaddr item, different algorithms are used to
+Depending on the protocol of a Multiaddr component, different algorithms are used to
 convert their values from/to binary representation. The name of the codec to use
 for each protocol is noted in [protocols.csv](protocols.csv).