GitHub templates fix (#4)

Author: paulbalaji

.github/CONTRIBUTING.md

@@ -1,4 +1,4 @@
-We are accepting issues and we want your [feedback](../README.md#give-us-feedback).
+We are accepting issues and we want your [feedback](https://github.com/spatialos/gdk-for-unity#give-us-feedback).
 
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.github/ISSUE_TEMPLATE.md

@@ -1,4 +1,4 @@
-**Contributions**: We are not currently taking public contributions - see our [contributions](CONTRIBUTING.md) policy. However, we are accepting issues and we do want your [feedback](https://github.com/spatialos/gdk-for-unity#give-us-feedback).
+**Contributions**: We are not currently taking public contributions - see our [contributions](https://docs.improbable.io/unity/alpha/contributing) policy. However, we are accepting issues and we do want your [feedback](https://github.com/spatialos/gdk-for-unity#give-us-feedback).
 
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@@ -13,4 +13,4 @@ What automated tests are included in this PR?
 How is this documented (for example: release note, upgrade guide, feature page, in-code documentation)?
 
 #### Primary reviewers
-If your change will take a long time to review, you can name at most two primary reviewers who are ultimately responsible for reviewing this request. @ mention them.
+If your change will take a long time to review, you can name at most two primary reviewers who are ultimately responsible for reviewing this request. @ mention them.