Add Dalmatian release information

Change-Id: I1b404f0801261c984afefab895bbddb55551748e

etc/default_data.json

@@ -47640,6 +47640,17 @@
                 }
             },
             "project": "openstack"
+        },
+        {
+            "release_name": "Dalmatian",
+            "end_date": "2024-Oct-02",
+            "refs": {
+                "governance": {
+                    "type": "big_tent",
+                    "source": "https://opendev.org/openstack/governance/raw/branch/master/reference/projects.yaml"
+                }
+            },
+            "project": "openstack"
         }
     ],
     "mail_lists": [