Fixed false positive vulnerabilities for Mattermost Desktop. (#41619)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #40007 

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.

## Testing

- [x] QA'd all new/changed functionality manually

changes/40007-mattermost-desktop-cpe

@@ -0,0 +1 @@
+* Fixed false positive vulnerabilities for Mattermost Desktop.

server/vulnerabilities/nvd/cpe_translations.json

@@ -748,5 +748,15 @@
     "filter": {
       "product": ["acrobat_reader_dc"]
     }
+  },
+  {
+    "software": {
+      "name": ["Mattermost", "/^Mattermost \\d/"],
+      "source": ["programs"]
+    },
+    "filter": {
+      "product": ["mattermost_desktop"],
+      "vendor": ["mattermost"]
+    }
   }
 ]