Add release version (7.72.0) for the method variables from the writeo…

…ut curl option (-w)

usingcurl/verbose/writeout.md

@@ -88,7 +88,7 @@ Some of these variables are not available in really old curl versions.
 | `json`                    | all write-out variables as a single JSON object. (Introduced in 7.72.0)                                                                                                                                                          |
 | `local_ip`                | IP address of the local end of the most recently used connection - can be either IPv4 or IPv6                                                                                                                                    |
 | `local_port`              | Local port number of the most recently used connection                                                                                                                                                                           |
-| `method`                  | HTTP method the most recent request used                                                                                                                                                                                         |
+| `method`                  | HTTP method the most recent request used. (Introduced in 7.72.0)                                                                                                                                                                                         |
 | `num_certs`               | Number of the certificates in the most recent TLS handshake. (Introduced in 7.88.0)                                                                                                                                              |
 | `num_connects`            | Number of new connects made in the recent transfer.                                                                                                                                                                              |
 | `num_headers`             | Number of response headers in the last response                                                                                                                                                                                  |