Fix broken breaking changes link

Author: cormacpayne

.github/PULL_REQUEST_TEMPLATE.md

@@ -18,7 +18,7 @@ This checklist is used to make sure that common guidelines for a pull request ar
 ### [General Guidelines](https://github.com/Azure/azure-powershell/blob/preview/CONTRIBUTING.md#general-guidelines)
 - [ ] Title of the pull request is clear and informative.
 - [ ] There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, [see this page](https://github.com/Azure/azure-powershell/blob/preview/documentation/cleaning-up-commits.md).
-- [ ] The pull request does not introduce [breaking changes](https://github.com/Azure/azure-powershell/blob/preview/documentation/breaking-changes.md) (unless a major version change occurs in the assembly and module).
+- [ ] The pull request does not introduce [breaking changes](https://github.com/Azure/azure-powershell/blob/preview/documentation/breaking-changes/breaking-changes-definition.md) (unless a major version change occurs in the assembly and module).
 
 ### [Testing Guidelines](https://github.com/Azure/azure-powershell/blob/preview/CONTRIBUTING.md#testing-guidelines)
 - [ ] Pull request includes test coverage for the included changes.