Fixing wrong format in IP Subnet field

IP Subnet field had a format that makes it very difficult to work with KQL. The format should just be a network range like 192.168.1.0/24
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cc: @cwatson-cat

Author: javiersoriano

articles/sentinel/watchlist-schemas.md

@@ -47,7 +47,7 @@ The Network Mapping watchlist lists IP subnets and their respective organization
 
 | Field name | Format       | Example                      | Mandatory/Optional |
 | ---------- | ------------ | ---------------------------- | ------------------ |
-| **IP Subnet**  | Subnet range |` 198.51.100.0/24 - 198….../22` | Mandatory          |
+| **IP Subnet**  | Subnet range | `198.51.100.0/24` | Mandatory          |
 | **Range Name** | String       | `DMZ`                          | Optional           |
 | **Tags**       | List         | `["Example","Example"]`        | Optional           |