chore: bump up Helm release postgresql to v13 (#5190)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [postgresql](https://bitnami.com) ([source](https://togithub.com/bitnami/charts/tree/HEAD/bitnami/postgresql)) | major | `12.5.8` -> `13.2.23` |

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.github/helm/affine-cloud/Chart.lock

@@ -1,6 +1,6 @@
 dependencies:
 - name: postgresql
   repository: https://charts.bitnami.com/bitnami
-  version: 12.5.8
-digest: sha256:c91c0dc1370e879538dc9d6e435e731a726ef99d6a3b081372318483792b48a7
-generated: "2023-06-27T18:34:12.683806+08:00"
+  version: 13.2.23
+digest: sha256:5b64538509bd067bb0f67bf082847a2c5d66dc37d0b9d7948a40405d9c446400
+generated: "2023-12-05T03:04:57.997927753Z"

.github/helm/affine-cloud/Chart.yaml

@@ -8,5 +8,5 @@ appVersion: '0.6.1'
 
 dependencies:
   - name: postgresql
-    version: 12.5.8
+    version: 13.2.23
     repository: https://charts.bitnami.com/bitnami