Add a changelog entry check for pull requests (#108)

.github/workflows/changelog-entry-check.yml

@@ -0,0 +1,29 @@
+name: Changelog entry check
+
+on:
+    pull_request:
+        types:
+        -   opened
+        -   reopened
+        -   labeled
+        -   unlabeled
+        -   synchronize
+
+defaults:
+    run:
+        shell: bash
+
+permissions:
+    contents: read
+    pull-requests: write
+
+jobs:
+    changelog-entry-check:
+        uses: dbt-labs/actions/.github/workflows/changelog-existence.yml@main
+        with:
+            changelog_comment: >-
+                Thank you for your pull request! We could not find a changelog entry for this change.
+                For details on how to document a change, see the
+                [dbt-postgres contributing guide](https://github.com/dbt-labs/dbt-postgres/blob/main/CONTRIBUTING.md).
+            skip_label: "Skip Changelog"
+        secrets: inherit