install_deps: tolerate a broken apt source (update best-effort)

A fresh Orin image carried a stale third-party apt source that made apt-get
update fail; with set -e that aborted the install. The packages come from the
main Ubuntu repos, so update is now best-effort and install proceeds.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

scripts/install_deps.sh

@@ -15,7 +15,10 @@ echo ">> Dependances pour JetPack ${JETPACK} (L4T ${L4T}, ${SOC})"
 # python3 is present on every JetPack image; websockets is the only bridge dep and
 # is pure Python, so it works identically everywhere. Prefer apt's package, fall
 # back to pip when the distro is too old to carry it.
-sudo apt-get update -qq
+# Best-effort: a broken third-party source (a stale packagecloud/VS Code repo has
+# been seen on a fresh Orin image) must not abort the whole install — the packages
+# below come from the main Ubuntu repos, which update fine on their own.
+sudo apt-get update -qq || true
 sudo apt-get install -y --no-install-recommends \
     build-essential cmake pkg-config git \
     libusb-1.0-0-dev libudev-dev liblz4-dev libjpeg-turbo8-dev \