bug: subscriber and publisher from examples are not working as expected.

[EmilIvanichkovv]

Problem

When trying to start subscriber and publisher from the examples folder they crash with unhandled exception

Impact

The impact is not significant, but it is good to have working examples.

To reproduce

Steps to reproduce:

1. Make all examples with make example2
2. Run ./build/subscriber

Expected behavior

The subscriber/publisher should be working, but I crashes with error indicated that a "node record is required"

Screenshots/logs

Result of running ./build/subscriber

NTC 2024-01-02 16:50:37.824+02:00 starting subscriber                        tid=132009 file=subscriber.nim:35 wakuPort=50000 discv5Port=8000
/some/nice/path/nwaku/examples/subscriber.nim(102) subscriber
/some/nice/path/nwaku/vendor/nim-chronos/chronos/internal/asyncfutures.nim(660) cb
Error: unhandled exception: Asynchronous task [setupAndSubscribe() at subscriber.nim:34] finished with an exception "LPError"!
Message: node record is required
Stack trace: /some/nice/path/nwaku/examples/subscriber.nim(102) subscriber
/some/nice/path/nwaku/examples/subscriber.nim(34) setupAndSubscribe
/some/nice/path/nwaku/vendor/nim-chronos/chronos/internal/asyncfutures.nim(378) futureContinue
/some/nice/path/nwaku/examples/subscriber.nim(44) setupAndSubscribe
/some/nice/path/nwaku/vendor/nim-results/results.nim(840) tryValue
 [FutureDefect]

nwaku version/commit hash

on master