Update RELEASE_TEMPLATE.md

Author: haikalpribadi

RELEASE_TEMPLATE.md

@@ -1,15 +1,20 @@
 PyPI package: https://pypi.org/project/grakn-client
-Documentation: https://dev.grakn.ai/docs/client-api/python
+Documentation: https://dev.docs.grakn.ai/docs/client-api/python
 
 ### Distribution
 
 Available through https://pypi.org
 ```
-pip install grakn-client
+pip install grakn-client=={version}
 ```
 Or you can upgrade your local installation with:
 ```
 pip install -U grakn-client
 ```
 
 { release notes }
+
+**Please refer to [full release notes of 2.0.0-alpha](https://github.com/graknlabs/client-python/releases/tag/2.0.0-alpha) to see the changes contained in 2.0.0.**
+
+
+