Add a default description to path of HTTP probes

Author: morihaya

content/en/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes.md

@@ -366,7 +366,7 @@ have additional fields that can be set on `httpGet`:
 * `host`: Host name to connect to, defaults to the pod IP. You probably want to
 set "Host" in httpHeaders instead.
 * `scheme`: Scheme to use for connecting to the host (HTTP or HTTPS). Defaults to HTTP.
-* `path`: Path to access on the HTTP server.
+* `path`: Path to access on the HTTP server. Defaults to /.
 * `httpHeaders`: Custom headers to set in the request. HTTP allows repeated headers.
 * `port`: Name or number of the port to access on the container. Number must be
 in the range 1 to 65535.