fix: nil pointer scaleway

[Azanul]

Problem

https://discord.com/channels/932683789384183808/1163851488288845884/1164167155835732088

INFO[2023-10-18T11:44:36+02:00] Debug logging is enabled
INFO[2023-10-18T11:44:36+02:00] Data will be stored in SQLite
INFO[2023-10-18T11:44:36+02:00] there are no new migrations to run (database is up to date)
INFO[2023-10-18T11:44:36+02:00] Komiser version: 3.0.20, commit: 5c3fe4df9497a48d9bae017193e3c73c320ade31, buildt: 1688681410
INFO[2023-10-18T11:44:36+02:00] Fetching resources workflow has started
WARN[2023-10-18T11:44:36+02:00] Newer Komiser version is available: v3.1.1
WARN[2023-10-18T11:44:36+02:00] Upgrade instructions: https://github.com/tailwarden/komiser
INFO[2023-10-18T11:44:36+02:00] Fetched resources                             account=pmw-scaleway-account provider=Scaleway resources=0 service=Function
INFO[2023-10-18T11:44:37+02:00] Fetched resources                             account=pmw-scaleway-account provider=Scaleway resources=2 service=ServerlessContainer
ERRO[2023-10-18T11:44:37+02:00] error fetching Scaleway resources             err="runtime error: invalid memory address or nil pointer dereference"

Solution

Added nil checks

[AvineshTripathi]

Please change the wordings in the log.Warnln