https://deb.dl.getenvoy.io/public/deb/debian install 402 error

Following https://www.envoyproxy.io/docs/envoy/latest/start/install#install-envoy-on-debian-gnu-linux instruction encounters the error below. It started to happen 1-2 days ago to our knowledge.

Easy reproduce: open https://deb.dl.getenvoy.io/public/deb/debian/dists/bookworm/InRelease in a browser

```
deb [arch=amd64 signed-by=/usr/share/keyrings/getenvoy-keyring.gpg] https://deb.dl.getenvoy.io/public/deb/debian bookworm main
Hit:1 http://deb.debian.org/debian bookworm InRelease
Err:2 https://deb.dl.getenvoy.io/public/deb/debian bookworm InRelease
402 Payment Required [IP: 13.225.131.2 443]
Hit:3 http://deb.debian.org/debian bookworm-updates InRelease
Hit:4 http://deb.debian.org/debian-security bookworm-security InRelease
Reading package lists... Done
E: Failed to fetch https://deb.dl.getenvoy.io/public/deb/debian/dists/bookworm/InRelease 402 Payment Required [IP: 13.225.131.2 443]
E: The repository 'https://deb.dl.getenvoy.io/public/deb/debian bookworm InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package getenvoy-envoy
root@831d9424280d:/# sudo apt update
Hit:1 http://deb.debian.org/debian bookworm InRelease
Hit:2 http://deb.debian.org/debian bookworm-updates InRelease
Hit:3 http://deb.debian.org/debian-security bookworm-security InRelease
Err:4 https://deb.dl.getenvoy.io/public/deb/debian bookworm InRelease
402 Payment Required [IP: 13.225.131.45 443]
Reading package lists... Done
E: Failed to fetch https://deb.dl.getenvoy.io/public/deb/debian/dists/bookworm/InRelease 402 Payment Required [IP: 13.225.131.45 443]
E: The repository 'https://deb.dl.getenvoy.io/public/deb/debian bookworm InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@831d9424280d:/# sudo apt install getenvoy-envoy
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package getenvoy-envoy
```

Start with the Debian installation instructions at https://www.envoyproxy.io/docs/envoy/latest/start/install#install-envoy-on-debian-gnu-linux and reproduce the failure by requesting the deb.dl.getenvoy.io InRelease URL or running apt update. Done means the documented Debian repository responds successfully and apt can locate getenvoy-envoy; the issue names no repository configuration file or test to change.

Written by the indexing model from the issue text.