chore(deps): update postgresql docker tag to v18

Author: small-hack-renovate[bot]

charts/matrix/Chart.lock

@@ -1,12 +1,12 @@
 dependencies:
 - name: postgresql
   repository: oci://registry-1.docker.io/bitnamicharts
-  version: 16.7.10
+  version: 18.0.7
 - name: coturn
   repository: https://small-hack.github.io/coturn-chart
   version: 9.1.0
 - name: matrix-authentication-service
   repository: https://small-hack.github.io/matrix-authentication-service-chart
   version: 1.6.0
-digest: sha256:aee9657a41197dafb1d60008e467cff5ee9940c31af51b1b91cdddddc85fe891
-generated: "2025-06-08T21:07:34.99203565Z"
+digest: sha256:313ef7cbbce6e8f3cac4262dbc1ff6a98ecefb52aa71561391cf5a63dd63903b
+generated: "2025-10-06T12:16:51.595110646Z"

charts/matrix/Chart.yaml

@@ -8,7 +8,7 @@ sources:
 
 type: application
 
-version: 20.0.0
+version: 21.0.0
 
 # renovate: image=ghcr.io/element-hq/synapse
 appVersion: v1.131.0
@@ -19,7 +19,7 @@ maintainers:
 
 dependencies:
   - name: postgresql
-    version: 16.7.10
+    version: 18.0.7
     repository: oci://registry-1.docker.io/bitnamicharts
     condition: postgresql.enabled