{scvmm} Fixes Azure/azure-cli-extensions#4749

[navba-MSFT]

Since git.io is deprecated https://github.blog/changelog/2022-04-25-git-io-deprecation/

updating the reference to it :
Old link: curl -L https://git.io/n-install | bash -s -- -y lts
New Link: curl -L https://bit.ly/n-install | bash -s -- -y lts

---

This checklist is used to make sure that common guidelines for a pull request are followed.

General Guidelines

• Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
• Have you run python scripts/ci/test_index.py -q locally?

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your PR is merged into master branch, a new PR will be created to update src/index.json automatically.
The precondition is to put your code inside this repo and upgrade the version in the PR but do not modify src/index.json.

Fixes #4749

[yonzhan]

scvmm

[navba-MSFT]

@zhoxing-ms Could you please review this PR and approve it once you get a chance ? Thanks in advance.