adding subscription block open animation

[anuj-adobe]

Recording of animation added -

https://github.com/aemsites/infosys/assets/66720268/71c9cda8-aaa6-4723-907d-41b0f75fc9bd

Fix #41

Test URLs:

• Before: https://main--infosys--aemsites.hlx.live/iki
• After: https://issue-41--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

* [02078fd](https://github.com/aemsites/infosys/commit/02078fd2a3c9bfe676b94b010514140038b0519d) :white_check_mark: (latest) * [c10e442](https://github.com/aemsites/infosys/commit/c10e4424ee55b7fec6c7f6cfc63f306554bcb124) :white_check_mark: * [f6cdd27](https://github.com/aemsites/infosys/commit/f6cdd2759ca5557cde329b8ecf9dbb05b2696ba4) :white_check_mark:

[aem-code-sync[bot]]

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