Fix a command to get the latest version in install.sh

[tenzen-y]

We can not get the latest version using install.sh as the below.

$ curl -fsSL https://code-server.dev/install.sh | sh
Ubuntu 20.04.3 LTS
Installing vhttps://github.com/coder/code-server/releases/tag/v3.12.0 of the amd64 deb package from GitHub.

+ mkdir -p ~/.cache/code-server
+ curl -#fL -o ~/.cache/code-server/code-server_https://github.com/coder/code-server/releases/tag/v3.12.0_amd64.deb.incomplete -C - https://github.com/cdr/code-server/releases/download/vhttps://github.com/coder/code-server/releases/tag/v3.12.0/code-server_https://github.com/coder/code-server/releases/tag/v3.12.0_amd64.deb
curl: (22) The requested URL returned error: 404 Not Found############## 100.0%##O#-#

It looks like this can not get a version out of https://github.com/coder/code-server/releases/tag/v3.12.0.

$ version="$(curl -fsSLI -o /dev/null -w "%{url_effective}" https://github.com/cdr/code-server/releases/latest)"
$ echo "${version#https://github.com/cdr/code-server/releases/tag/}"
https://github.com/coder/code-server/releases/tag/v3.12.0

So, this PR fixes a command to get the latest version in install.sh.
Also, I have confirmed that it works with the following.

$ version="$(curl -fsSLI -o /dev/null -w "%{url_effective}" https://github.com/cdr/code-server/releases/latest)"
$ echo "${version#https://github.com/coder/code-server/releases/tag/}"
v3.12.0

Fixes #4634

[jsjoeio]

You're quick! We switched GitHub orgs within the last 24hrs. Thanks for fixing this!

[jsjoeio]

Argh, looks like we're going to need to update this in a lot of places

[tenzen-y]

Thank you for your review!
Since #4638 seems to have fixed this problem, I'd like to close this PR.
Does it sound good to you? @jsjoeio

[jsjoeio]

@tenzen-y ah right! Good call. Yes, sounds good. Thank you so much for the quick reply and for offering to fix this! We really appreciate it.