Update docker.io/library/postgres Docker tag to v18

requirements.yml

@@ -1,17 +1,11 @@
 collections:
-  # debops.debops
+  # Install a collection from Ansible Galaxy.
-  - source: https://github.com/debops/debops
+  - name: debops.debops
-    type: git
+    version: ">=3.1.0"
-    version: "v3.2.5"
+    source: https://galaxy.ansible.com
-  # community.sops
+  - name: community.sops
-  - source: https://github.com/ansible-collections/community.sops
+    version: ">=2.2.4"
-    type: git
+    source: https://galaxy.ansible.com
-    version: "2.2.7"
+  - name: community.docker
-  # community.docker
+    version: ">=5.0.0"
-  - source: https://github.com/ansible-collections/community.docker
+    source: https://galaxy.ansible.com
-    type: git
-    version: "5.0.5"
-  # grafana.grafana
-  - source: https://github.com/grafana/grafana-ansible-collection
-    type: git
-    version: "6.0.6"