chore(deps): update mattermost package dependencies

| datasource | package                                                     | from   | to     |
| ---------- | ----------------------------------------------------------- | ------ | ------ |
| helm       | mattermost-enterprise-edition                               | 2.6.53 | 2.6.54 |
| docker     | mattermost/mattermost-enterprise-edition                    | 9.8.0  | 9.9.0  |
| docker     | registry1.dso.mil/ironbank/opensource/mattermost/mattermost | 9.8.0  | 9.8.1  |

common/zarf.yaml

@@ -18,6 +18,6 @@ components:
         namespace: mattermost
         url: https://helm.mattermost.com
         gitPath: chart
-        version: 2.6.53
+        version: 2.6.54
         valuesFiles:
           - ../values/common-values.yaml

values/registry1-values.yaml

@@ -1,7 +1,7 @@
 mattermostApp:
   image:
     repository: registry1.dso.mil/ironbank/opensource/mattermost/mattermost
-    tag: 9.8.0
+    tag: 9.8.1
 initContainerImage:
   repository: registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal
   tag: 9.4

values/upstream-values.yaml

@@ -1,4 +1,4 @@
 mattermostApp:
   image:
     repository: mattermost/mattermost-enterprise-edition
-    tag: 9.8.0
+    tag: 9.9.0

zarf.yaml

@@ -34,7 +34,7 @@ components:
           - values/upstream-values.yaml
     images:
       - appropriate/curl:latest
-      - mattermost/mattermost-enterprise-edition:9.8.0
+      - mattermost/mattermost-enterprise-edition:9.9.0
 
   - name: mattermost
     required: true
@@ -51,4 +51,4 @@ components:
           - values/registry1-values.yaml
     images:
       - registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal:9.4
-      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.8.0
+      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.8.1