Bug: Release download URL fix (#553)

[CodeBreaker444]

Description

While building the docker image from https://github.com/gitpod-io/openvscode-releases, the github release url for downloading the release of openvscode-server is not properly getting parsed (wrong release name) and throwing 404 not found error from github. Like in the below image!

Related Issue(s)

Fixes #553

How to test

1. Run docker build --tag "vscode" --build-arg RELEASE_TAG=v1.88.0 --build-arg RELEASE_TYPE=insiders .
2. After this you run the docker image as usual.

Note: You don't need to pass RELEASE_TYPE argument if the release is a stable release.

Documentation