index: Restore previous revision of the nRF Edge AI add-on (#111)

When adding the nRF Edge AI release v2.0.0 to the index the previous
version (v1.0.0) was removed. This commit restores it,
so its documentation can be accessed.

Signed-off-by: Michał Grochala <michal.grochala@nordicsemi.no>

Author: grochu

index/nrfconnect.json

@@ -258,6 +258,12 @@
           "name": "nRF Edge AI Add-on v2.0.0",
           "date": "2026-03-06T00:00:00Z",
           "sdk": "v3.3.0-preview2"
+        },
+        {
+          "tag": "v1.0.0",
+          "name": "nRF Edge AI Add-on v1.0.0",
+          "date": "2025-12-09T00:00:00Z",
+          "sdk": "v3.2.0"
         }
       ],
       "defaultBranch": "v2.0.0"