Improve SEO and Accessibility Score

[anuj-adobe]

Fixed two seo issues -

1. Added href='#' in empty tags - one in subscription block and other in footer block
2. Made 3 links descriptive in hero slider block

SEO Score improved from 54 to 86. The only issue left is page is not indexed, which I think is fine until page is made live.

Accessibility score improved from 95 to 98 by adding aria-label to search icon header.

Fix #70

Test URLs:

• Before: https://main--infosys--aemsites.hlx.live/iki
• After: https://issue-70--infosys--aemsites.hlx.live/iki

[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
• [ ] Re-sync branch

Commits

* [1ecd1e7](https://github.com/aemsites/infosys/commit/1ecd1e76bbcd2287811e8938cc58a3eff540508c) :white_check_mark: (latest) * [da9ea3c](https://github.com/aemsites/infosys/commit/da9ea3caf99c663aba27e1cb55f9a1467f509a3d) :white_check_mark: * [2eefffc](https://github.com/aemsites/infosys/commit/2eefffc03fed2439173664d70812f5a0a746b85b) :white_check_mark: * [c73847f](https://github.com/aemsites/infosys/commit/c73847f04842b961e2921c75bba3c4b5a44f341e) :white_check_mark: * [72eb0e9](https://github.com/aemsites/infosys/commit/72eb0e9ff6e9959f32f2d1e5b4f6ac2a0f6944aa) :white_check_mark: * [2429ab0](https://github.com/aemsites/infosys/commit/2429ab0257de785671bf9113163c6c8e8ea23ab6) :white_check_mark:

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/iki