feat: LinkedIn id support in Author Block

[asthabh23]

Description

This PR contains additional support for LinkedIn id (as a fallback) if Github ID isn't present in author block for blog templates

Related Issue

This is a newly introduced feature support.

Motivation and Context

For blog templates, this will help support add link to LinkedIn profile if Github profile isn't there. Github profile link is the default one to be shown on the block.

How Has This Been Tested?

Tested for the 3 cases:

• When only Github ID is present.
• When only LinkedIn ID is present.
• When both Github and LinkedIn IDs are present (it defaults to GIthub ID in this case)

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

This PR addresses issue: https://github.com/adobe/helix-website/issues/673

https://main--helix-website--adobe.aem.live/blog/aem-live-at-dev-live vs https://issue-673--helix-website--adobe.aem.live/blog/aem-live-at-dev-live

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

• [ ] Re-run PSI checks
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Commits

* [f7bed9e](https://github.com/adobe/helix-website/commit/f7bed9e9ec401ed07a322eb43baa25323c03e2d6) :white_check_mark: (latest)

[aem-code-sync[bot]]

	Page	Scores	Audits	Google
:iphone:	/blog/aem-live-at-dev-live
:desktop_computer:	/blog/aem-live-at-dev-live