Fix missing image on Versa SD-WAN dashboard (DataDog#23579)

The image widget was pointing to /api/v2/images/<UUID>, which is the
per-org image upload API. The UUID only resolved in the demo org where
the dashboard was originally built, so the image was missing for all
customers (reported on prod and staging).

Switch to the static asset path used by sibling integrations (e.g.
Cisco SD-WAN), which is org-agnostic and ships with web-ui.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: kylerkang

versa/assets/dashboards/versa.json

@@ -16,7 +16,7 @@
             "id": 6107883287952970,
             "definition": {
               "type": "image",
-              "url": "/api/v2/images/32d08fa3-bbc7-4285-ad3f-72cc275a4eb9",
+              "url": "/static/images/logos/versa_large.svg",
               "sizing": "contain",
               "has_background": true,
               "has_border": true,