Update hashicorp/vault Docker tag to v1.18.3 (#996)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

clusters/cl01tl/platform/vault/values.yaml

@@ -12,7 +12,7 @@ vault:
     enabled: true
     image:
       repository: hashicorp/vault
-      tag: 1.18.2
+      tag: 1.18.3
     updateStrategyType: "RollingUpdate"
     logLevel: debug
     logFormat: standard
@@ -183,7 +183,7 @@ snapshot:
         snapshot:
           image:
             repository: hashicorp/vault
-            tag: 1.18.2
+            tag: 1.18.3
             pullPolicy: IfNotPresent
           command:
             - /bin/ash