chore: fix peer-d typo in readmes (libp2p#31)

Author: tabcat

README.md

@@ -16,7 +16,7 @@
 
 ## Structure
 
-- [`/packages/libp2p-peer-id`](./packages/libp2p-peer-id) Implementation of @libp2p/interface-peer-d
+- [`/packages/libp2p-peer-id`](./packages/libp2p-peer-id) Implementation of @libp2p/interface-peer-id
 - [`/packages/libp2p-peer-id-factory`](./packages/libp2p-peer-id-factory) Create PeerId instances
 
 ## License

packages/libp2p-peer-id/README.md

@@ -6,7 +6,7 @@
 [![codecov](https://img.shields.io/codecov/c/github/libp2p/js-libp2p-peer-id.svg?style=flat-square)](https://codecov.io/gh/libp2p/js-libp2p-peer-id)
 [![CI](https://img.shields.io/github/workflow/status/libp2p/js-libp2p-interfaces/test%20&%20maybe%20release/master?style=flat-square)](https://github.com/libp2p/js-libp2p-peer-id/actions/workflows/js-test-and-release.yml)
 
-> Implementation of @libp2p/interface-peer-d
+> Implementation of @libp2p/interface-peer-id
 
 ## Table of contents <!-- omit in toc -->