As we transition to the new Hyland Community, some post links may be temporarily disrupted as we finalize redirects. We apologize for the inconvenience and are working to resolve this as quickly as possible. Details.
You can edit it inside the Aikau JAR file. Search for a file named like this in share: aikau-1.0.*.*.jar
Inside the Aikau file, the folder you are looking for is
META-INF\js\aikau\1.0.*.*\alfresco\footer
Let me know if you need any additional help.