- Update CC-BY version to specify 4.0

Author: Matt David

bip-0075.mediawiki

@@ -23,9 +23,9 @@ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "S
 
 ==Copyright==
 
-<img src="https://licensebuttons.net/l/by/3.0/88x31.png">
+<img src="https://licensebuttons.net/l/by/4.0/88x31.png">
 
-This BIP is licensed under CC BY.
+This work is licensed under a [[http://creativecommons.org/licenses/by/4.0/|Creative Commons Attribution 4.0 International License]].
 
 ==Definitions==
 {| class="wikitable"