[Template]Update template to point to configuration.md in yang-models folder (#10777)

… folder

#### Why I did it
Update template to point to configuration.md in yang-model folder.

Author: dgsudharsan

.github/pull_request_template.md

@@ -42,7 +42,7 @@ pull request for inclusion in the changelog:
 <!--
 Provide a link to config_db schema for the table for which YANG model
 is defined
-Link should point to correct section on https://github.com/Azure/SONiC/wiki/Configuration.
+Link should point to correct section on https://github.com/Azure/sonic-buildimage/blob/master/src/sonic-yang-models/doc/Configuration.md
 -->
 
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