Fixed broken link

[RufusJWB]

Purpose

• Fixes a broken link in the README.md file

Does this introduce a breaking change?

[ ] Yes
[X] No

Pull Request Type

What kind of change does this Pull Request introduce?

[X] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[X] Documentation content changes
[ ] Other... Please describe:

How to Test

• Render README.md in github

What to Check

Verify that the following are valid

• Rendered link should point to https://aka.ms/aci and not to https://github.com/Azure-Samples/aci-confidential-hello-world/blob/main/aka.ms/aci

Other Information