Fix a link

Author: snoyberg

ChangeLog.md

@@ -16,7 +16,7 @@
 * Give warnings on unexpected config keys [#48](https://github.com/commercialhaskell/stack/issues/48)
 * Remove Docker `pass-host` option
 * Don't require cabal-install to upload [#313](https://github.com/commercialhaskell/stack/issues/313)
-* Generate indexes for all deps and all installed snapshot packages [#143](https://github.com/fpco/commercialhaskell/issues/143)
+* Generate indexes for all deps and all installed snapshot packages [#143](https://github.com/commercialhaskell/stack/issues/143)
 * Provide `--resolver global` option [#645](https://github.com/commercialhaskell/stack/issues/645)
     * Also supports `--resolver nightly`, `--resolver lts`, and `--resolver lts-X`
 * Make `stack build --flag` error when flag or package is unknown [#617](https://github.com/commercialhaskell/stack/issues/617)