[Bug]: PGP icon name mismatch between documentation and implementation

### What happened? On the [Wiki Icons](https://github.com/adityatelange/hugo-PaperMod/wiki/Icons) page, the PGP icon is documented as pgp. However, in the implementation introduced in #784, the actual icon name is pgpkey. As a result, configuring a social icon using pgp (following the wiki documentation) does not load the icon correctly. The configuration only works when using pgpkey. I propose either: changing the implementation name from pgpkey to pgp, or updating the wiki/documentation to use pgpkey instead. (Updating the wiki may be the simplest option in my opinion) If desired, I can also prepare a pull request/documentation update for this change. ### Steps to reproduce Configure a social icon using the name `pgp` as documented in the Wiki Icons page: ``` socialIcons: - "name": "pgp" "url:" "https://example.com/key.asc" ``` Run/build the site. PGP icon is not displayed. Change the icon name from `pgp` to `pgpkey`: ``` socialIcons: - "name": "pgpkey" "url": "https://example.com/key.asc" ``` Rebuild the site. The icon now displays correctly. ### Hugo Version Hugo >= 0.146.0 (Recommended - Minimum version required for PaperMod) ### PaperMod Version Commit-id:c4ca7ca486ecd67c8f6bba31551a6ee0d1455926 ### What kind of devices are you seeing the problem on? Desktop ### What browsers are you seeing the problem on? _No response_ ### Browser Version _No response_ ### Relevant log output ```shell none ``` ### Repository/Source Code link where this issue can be reproduced _No response_ ### Code of Conduct - [x] I agree to follow this project's Code of Conduct