Fix default value of KEEPALIVE_TIME (#1239)

content/en/docs/guides/keepalive.md

@@ -44,7 +44,7 @@ gRPC HTTP/2 keepalives can be useful in a variety of situations, including but n
 
 | Options | Availability | Description | Client Default | Server Default |
 |---|---|---|---|---|
-| `KEEPALIVE_TIME` | Client and Server | The interval in milliseconds between PING frames. | INT_MAX (Disabled) | 27200000 (2 hours) |
+| `KEEPALIVE_TIME` | Client and Server | The interval in milliseconds between PING frames. | INT_MAX (Disabled) | 7200000 (2 hours) |
 | `KEEPALIVE_TIMEOUT` | Client and Server | The timeout in milliseconds for a PING frame to be acknowledged. If sender does not receive an acknowledgment within this time, it will close the connection. | 20000 (20 seconds) | 20000 (20 seconds) |
 | `KEEPALIVE_WITHOUT_CALLS` | Client | Is it permissible to send keepalive pings from the client without any outstanding streams. | 0 (false) | N/A |
 | `PERMIT_KEEPALIVE_WITHOUT_CALLS` | Server | Is it permissible to send keepalive pings from the client without any outstanding streams. | N/A | 0 (false) |