chore(deps): update confluence package dependencies

| datasource | package                                                                     | from        | to          |
| ---------- | --------------------------------------------------------------------------- | ----------- | ----------- |
| git-tags   | https://repo1.dso.mil/big-bang/product/community/confluence.git             | 1.18.0-bb.0 | 1.20.0-bb.0 |
| docker     | registry1.dso.mil/ironbank/atlassian/confluence-data-center/confluence-node | 8.8.0       | 8.9.1       |

values/registry1-values.yaml

@@ -5,7 +5,7 @@ ingress:
 
 image:
   repository: registry1.dso.mil/ironbank/atlassian/confluence-data-center/confluence-node
-  tag: "8.8.0"
+  tag: "8.9.1"
 
 #Turn off collaborative editing
 synchrony:

zarf.yaml

@@ -38,9 +38,9 @@ components:
         namespace: confluence
         url: https://repo1.dso.mil/big-bang/product/community/confluence.git
         gitPath: chart
-        version: 1.18.0-bb.0
+        version: 1.20.0-bb.0
         valuesFiles:
           - values/registry1-values.yaml
     images:
-      - registry1.dso.mil/ironbank/atlassian/confluence-data-center/confluence-node:8.8.0
+      - registry1.dso.mil/ironbank/atlassian/confluence-data-center/confluence-node:8.9.1
       - registry1.dso.mil/ironbank/big-bang/base:2.1.0