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

PR-URL: #60260
Reviewed-By: Darshan Sen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: jakecastelli

doc/api/cli.md

@@ -3891,6 +3891,8 @@ documented here:
 
 ### `--harmony-shadow-realm`
 
+### `--heap-snapshot-on-oom`
+
 ### `--interpreted-frames-native-stack`
 
 ### `--jitless`