fix(docs): update contributing link on README (#1658)

Signed-off-by: Josh Kurz <[email protected]>

Author: jkurz

.github/CONTRIBUTING.md

@@ -172,7 +172,7 @@ Checklist:
   - [ ] I made sure all breaking changes are noted
   - [x] I'm not going to say "nifty" anymore
 
-[elsewhere]: README.md#elsewhere
+[elsewhere]: ../README.md#elsewhere
 [gcloudcli]: https://developers.google.com/cloud/sdk/gcloud/
 [indvcla]: https://developers.google.com/open-source/cla/individual
 [corpcla]: https://developers.google.com/open-source/cla/corporate

README.md

@@ -1143,7 +1143,7 @@ loggingClient.getEntries(function(err, entries) {
 
 Contributions to this library are always welcome and highly encouraged.
 
-See [CONTRIBUTING](CONTRIBUTING.md) for more information on how to get started.
+See [CONTRIBUTING](.github/CONTRIBUTING.md) for more information on how to get started.
 
 ## License