Review: troubleshooting.md

Part of #40 (Phase 1).

Native-speaker review of troubleshooting.md by @Honaminto.

How to reply. Open a PR editing the French directly — one PR for this lecture, titled e.g. [troubleshooting] Corrections — or leave line comments / suggestion blocks on it. Priorities: meaning errors, wrong technical terms, inconsistent terminology, unnatural French (academic register), anything in code comments that looks wrong. Ignore spacing before : ; ! ?, errors in the English, and the translation: header. A wrong term that recurs belongs on the terminology issue, not here.

Done when a PR by @Honaminto touching this file is merged, or he states here that the lecture needs no change. Either outcome is recorded; nothing is ticked by hand.

Esaminare lectures/troubleshooting.md in francese confrontandolo con la fonte inglese in lectures/troubleshooting.md. Verificare il significato, la terminologia tecnica, la coerenza della formulazione, il francese accademico e i commenti del codice, ignorando le osservazioni indicate relative alla spaziatura e alle intestazioni. Il lavoro sarà completato quando verrà eseguito il merge di un PR che modifica questo file oppure quando il reviewer confermerà che non sono necessarie modifiche.