Update docs to allow query plan links in postgres.ai

doc/development/database_review.md

@@ -144,7 +144,10 @@ test its execution using `CREATE INDEX CONCURRENTLY` in the `#database-lab` Slac
 ##### Query Plans
 
 - The query plan for each raw SQL query included in the merge request along with the link to the query plan following each raw SQL snippet.
-- Provide the link to the plan at: [explain.depesz.com](https://explain.depesz.com). Paste both the plan and the query used in the form.
+- Provide a public link to the plan from either:
+  - [postgres.ai](https://postgres.ai/): Follow the link in `#database-lab` and generate a shareable, public link
+    by clicking the **Share** button in the upper right corner.
+  - [explain.depesz.com](https://explain.depesz.com): Paste both the plan and the query used in the form.
 - When providing query plans, make sure it hits enough data:
   - You can use a GitLab production replica to test your queries on a large scale,
   through the `#database-lab` Slack channel or through [ChatOps](understanding_explain_plans.md#chatops).