Update URL for Product sections, stages, groups

.gitlab/merge_request_templates/Documentation.md

@@ -45,7 +45,7 @@ All reviewers can help ensure accuracy, clarity, completeness, and adherence to
 
 **2. Technical Writer**
 
-- [ ] Technical writer review. If not requested for this MR, must be scheduled post-merge. To request for this MR, assign the writer listed for the applicable [DevOps stage](https://about.gitlab.com/handbook/product/categories/#devops-stages).
+- [ ] Technical writer review. If not requested for this MR, must be scheduled post-merge. To request for this MR, assign the writer listed for the applicable [DevOps stage](https://about.gitlab.com/handbook/product/product-categories/#devops-stages).
   - [ ] Add ~"Technical Writing" and `docs::` workflow label.
   - [ ] Add ~docs-only when the only files changed are under `doc/*`.
   - [ ] Add a `docs::` scoped label.