docs(cert): list valid units for CERTIFICATE_EXPIRATION
Fixes
@@ -221,13 +221,13 @@ Here are some examples of conditions you can use:
#### Placeholders
| Placeholder | Description | Example of resolved value |
-|:---------------------------|:---------------------------------------------------------|:---------------------------------------------|
+|:---------------------------|:------------------------------------------------------------------------------------------|:---------------------------------------------|
| `[STATUS]` | Resolves into the HTTP status of the request | 404 |
| `[RESPONSE_TIME]` | Resolves into the response time the request took, in ms | 10 |
| `[IP]` | Resolves into the IP of the target host | 192.168.0.232 |
| `[BODY]` | Resolves into the response body. Supports JSONPath. | `{"name":"john.doe"}` |
| `[CONNECTED]` | Resolves into whether a connection could be established | `true` |
-| `[CERTIFICATE_EXPIRATION]` | Resolves into the duration before certificate expiration | `24h`, `48h`, 0 (if not protocol with certs) |
+| `[CERTIFICATE_EXPIRATION]` | Resolves into the duration before certificate expiration (valid units are "s", "m", "h".) | `24h`, `48h`, 0 (if not protocol with certs) |
| `[DNS_RCODE]` | Resolves into the DNS status of the response | NOERROR |
