fix: Added a shortlink to the ExtensionLayerVersion release page

[MassimoSporchia]

What does this PR do?

Added a more explicit link to GitHub

Motivation

it wasn't straightforward to know which one should've been picked
Customers failed Lambda deployments and didn't have traces coming through (Lambda layer was missing)

Testing Guidelines

Additional Notes

Types of Changes

• Bug fix
• New feature
• Breaking change
• Misc (docs, refactoring, dependency upgrade, etc.)

Check all that apply

• This PR's description is comprehensive
• This PR contains breaking changes that are documented in the description
• This PR introduces new APIs or parameters that are documented and unlikely to change in the foreseeable future
• This PR impacts documentation, and it has been updated (or a ticket has been logged)
• This PR's changes are covered by the automated tests
• This PR collects user input/sensitive content into Datadog

[MassimoSporchia]

👀