PR template: Update links to kubernetes/community repo

.github/PULL_REQUEST_TEMPLATE.md

 <!--  Thanks for sending a pull request!  Here are some tips for you:
-1. If this is your first time, read our contributor guidelines https://github.com/kubernetes/kubernetes/blob/master/CONTRIBUTING.md and developer guide https://github.com/kubernetes/kubernetes/blob/master/docs/devel/development.md
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-3. Follow the instructions for writing a release note: https://github.com/kubernetes/kubernetes/blob/master/docs/devel/pull-requests.md#release-notes
+1. If this is your first time, read our contributor guidelines https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md#pull-request-process and developer guide https://github.com/kubernetes/community/blob/master/contributors/devel/development.md#development-guide
+2. If you want *faster* PR reviews, read how: https://github.com/kubernetes/community/blob/master/contributors/devel/faster_reviews.md
+3. Follow the instructions for writing a release note: https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md#release-notes
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 **What this PR does / why we need it**:

docs/devel/pull-requests.md

-This file has moved to [https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md](https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md)
+This file has moved to [https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md](https://github.com/kubernetes/community/blob/master/contributors/devel/pull-requests.md#pull-request-process)