chore(deps): update mattermost package dependencies

| datasource | package                                                     | from   | to     |
| ---------- | ----------------------------------------------------------- | ------ | ------ |
| helm       | mattermost-enterprise-edition                               | 2.6.51 | 2.6.53 |
| docker     | mattermost/mattermost-enterprise-edition                    | 9.7.2  | 9.8.0  |
| docker     | registry1.dso.mil/ironbank/opensource/mattermost/mattermost | 9.7.2  | 9.8.0  |
| docker     | registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal          | 9.3    | 9.4    |

common/zarf.yaml

@@ -18,6 +18,6 @@ components:
         namespace: mattermost
         url: https://helm.mattermost.com
         gitPath: chart
-        version: 2.6.51
+        version: 2.6.53
         valuesFiles:
           - ../values/common-values.yaml

values/registry1-values.yaml

@@ -1,7 +1,7 @@
 mattermostApp:
   image:
     repository: registry1.dso.mil/ironbank/opensource/mattermost/mattermost
-    tag: 9.7.2
+    tag: 9.8.0
 initContainerImage:
   repository: registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal
-  tag: 9.3
+  tag: 9.4

values/upstream-values.yaml

@@ -1,4 +1,4 @@
 mattermostApp:
   image:
     repository: mattermost/mattermost-enterprise-edition
-    tag: 9.7.2
+    tag: 9.8.0

zarf.yaml

@@ -34,7 +34,7 @@ components:
           - values/upstream-values.yaml
     images:
       - appropriate/curl:latest
-      - mattermost/mattermost-enterprise-edition:9.7.2
+      - mattermost/mattermost-enterprise-edition:9.8.0
 
   - name: mattermost
     required: true
@@ -50,5 +50,5 @@ components:
         valuesFiles:
           - values/registry1-values.yaml
     images:
-      - registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal:9.3
-      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.7.2
+      - registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal:9.4
+      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.8.0