docs: fix pull request link to target CodeForPhilly fork
@@ -4,4 +4,4 @@ This book is the living documentation for developers and operators working on [t
It is maintained in the [GitBook format](https://gitbookio.gitbooks.io/docs-toolchain/structure.html) within [the `docs/` directory](https://github.com/CodeForPhilly/chime/tree/master/docs) of the project's main Git repository, and new versions are published automatically upon merge to the `master` branch to: [codeforphilly.github.io/chime](https://codeforphilly.github.io/chime)
-To contribute to this book, please [open a pull request against the master branch of github.com/CodeForPhilly/chime](https://github.com/pennsignals/chime/compare/master).
+To contribute to this book, please [open a pull request against the master branch of github.com/CodeForPhilly/chime](https://github.com/CodeForPhilly/chime/compare/master).
