doc: add --heap-snapshot-on-oom to useful v8 flag

PR-URL: #60260
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: jakecastelli

doc/api/cli.md

@@ -3886,6 +3886,8 @@ documented here:
 
 ### `--harmony-shadow-realm`
 
+### `--heap-snapshot-on-oom`
+
 ### `--interpreted-frames-native-stack`
 
 ### `--jitless`