Add missing docs for updated_script activity (#29803)

Work was done in a previous release but (probably due to a merge
conflict resolution) the activity list update was missed, so docs were
missing this.

docs/Contributing/reference/audit-logs.md

@@ -1014,6 +1014,25 @@ This activity contains the following fields:
 }
 ```
 
+## updated_script
+
+Generated when a script is updated.
+
+This activity contains the following fields:
+- "script_name": Name of the script.
+- "team_id": The ID of the team that the script applies to, `null` if it applies to devices that are not in a team.
+- "team_name": The name of the team that the script applies to, `null` if it applies to devices that are not in a team.
+
+#### Example
+
+```json
+{
+  "script_name": "set-timezones.sh",
+  "team_id": 123,
+  "team_name": "Workstations"
+}
+```
+
 ## created_windows_profile
 
 Generated when a user adds a new Windows profile to a team (or no team).

server/fleet/activities.go

@@ -158,7 +158,8 @@ var ActivityDetailsList = []ActivityDetails{
 	ActivityTypeRanScript{},
 	ActivityTypeAddedScript{},
 	ActivityTypeDeletedScript{},
-	ActivityTypeEditedScript{},
+	ActivityTypeEditedScript{},  // via GitOps
+	ActivityTypeUpdatedScript{}, // via individual script update endpoint
 
 	ActivityTypeCreatedWindowsProfile{},
 	ActivityTypeDeletedWindowsProfile{},