fix footnote

README.md

@@ -4,7 +4,7 @@
 
 ![Raft + Badger backend plugin](https://cdn.ifelse.io/images/raft-badger.png)
 
-This repository provides a storage backend for the excellent [raft package](https://github.com/hashicorp/raft) from Hashicorp. Raft is a distributed consensus protocol that has many uses in distributed systems, ranging from fault-tolerant databases to clock synchronization to things like Google's PageRank[^1].
+This repository provides a storage backend for the excellent [raft package](https://github.com/hashicorp/raft) from Hashicorp. Raft is a [distributed consensus](https://en.wikipedia.org/wiki/Consensus_(computer_science)) protocol that has many uses in distributed systems, ranging from fault-tolerant databases to clock synchronization to things like Google's PageRank.
 
 This package exports the `BadgerStore`, which is an implementation of both a `LogStore` and `StableStore` (interfaces used by the raft package for reading/writing logs as part of its consensus protocol).
 
@@ -79,5 +79,3 @@ This package is meant to be used with the [raft package](https://github.com/hash
 -   support custom badger options
 -   explore other encodings besides `gob`
 -   add more examples of use with raft
-
-[^1]: https://en.wikipedia.org/wiki/Consensus_(computer_science)