doc:it_IT: update documents in process/

Update Italian translation following these changes under Documentation/process

commit eb5ed2fa ("docs: submitting-patches: Advertise b4")
commit 413e775e ("Documentation: fix links to mailing list services")
commit 47c67ec1 ("docs: submit-checklist: use subheadings")
commit 5969fbf3 ("docs: submit-checklist: structure by category")
commit 5f99665e ("kbuild: raise the minimum GNU Make requirement to 4.0")
commit 62739571 ("docs: document python version used for compilation")
commit 7a23b027 ("arm64: boot: Support Flat Image Tree")
commit 56f64b37 ("rust: upgrade to Rust 1.78.0")
commit 82b8000c ("net: drop special comment style")
commit 6813216b ("Documentation: coding-style: ask function-like macros to evaluate parameters")
commit 91031ca3 ("docs: improve comment consistency in .muttrc example configuration")
commit 7fe7de7b ("Docs/process/email-clients: Document HacKerMaiL")
commit 9c03bc90 ("Documentation: process: Revert "Document suitability of Proton Mail for kernel development"")
commit f9a4f4a0 ("Docs: Move magic-number from process to staging")
commit 7400d25a ("Docs/process/index: Remove riscv/patch-acceptance from 'Other materi
al' section")

Signed-off-by: Federico Vaga <federico.vaga@vaga.pv.it>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20241009224518.15585-1-federico.vaga@vaga.pv.it