chore(deps): update mattermost package dependencies (#48)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [mattermost-enterprise-edition](https://mattermost.com)
([source](https://github.com/mattermost/mattermost-helm)) | patch |
`2.6.49` -> `2.6.50` |
| mattermost/mattermost-enterprise-edition | minor | `9.6.1` -> `9.7.1`
|
|
[registry1.dso.mil/ironbank/opensource/mattermost/mattermost](https://mattermost.com)
([source](https://repo1.dso.mil/dsop/opensource/mattermost/mattermost))
| minor | `9.6.1` -> `9.7.1` |

---

### Release Notes

<details>
<summary>mattermost/mattermost-helm
(mattermost-enterprise-edition)</summary>

###
[`v2.6.50`](https://github.com/mattermost/mattermost-helm/releases/tag/mattermost-enterprise-edition-2.6.50)

[Compare
Source](https://github.com/mattermost/mattermost-helm/compare/mattermost-enterprise-edition-2.6.49...mattermost-enterprise-edition-2.6.50)

Mattermost Enterprise server with high availitibity.

</details>

---

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Release-As: v9.7.1-uds.0

common/zarf.yaml

@@ -18,6 +18,6 @@ components:
         namespace: mattermost
         url: https://helm.mattermost.com
         gitPath: chart
-        version: 2.6.49
+        version: 2.6.50
         valuesFiles:
           - ../values/common-values.yaml

values/registry1-values.yaml

@@ -1,7 +1,7 @@
 mattermostApp:
   image:
     repository: registry1.dso.mil/ironbank/opensource/mattermost/mattermost
-    tag: 9.6.1
+    tag: 9.7.1
 initContainerImage:
   repository: registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal
   tag: 9.3

values/upstream-values.yaml

@@ -1,4 +1,4 @@
 mattermostApp:
   image:
     repository: mattermost/mattermost-enterprise-edition
-    tag: 9.6.1
+    tag: 9.7.1

zarf.yaml

@@ -34,7 +34,7 @@ components:
           - values/upstream-values.yaml
     images:
       - appropriate/curl:latest
-      - mattermost/mattermost-enterprise-edition:9.6.1
+      - mattermost/mattermost-enterprise-edition:9.7.1
 
   - name: mattermost
     required: true
@@ -51,4 +51,4 @@ components:
           - values/registry1-values.yaml
     images:
       - registry1.dso.mil/ironbank/redhat/ubi/ubi9-minimal:9.3
-      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.6.1
+      - registry1.dso.mil/ironbank/opensource/mattermost/mattermost:9.7.1