[UI]: Underline from Slack and GitHub links should be removed

[yjrathod]

Describe the UI issue

On the Welcome page, in the "Join Our Community" section at the bottom of page, the Slack and GitHub links are currently underlined even when not hovered over.
This makes the section look a bit cluttered and less polished.

It would look cleaner if:

• The underline is removed by default.
• The underline appears only on hover with a smooth ease-in-out transition.
• The link text is slightly bolder to maintain emphasis without the underline.

Screenshots

[AbhiCode-247]

@idanlodzki I am fully prepared to work on this issue. Could you please assign this issue to me?

[idanlodzki]

@AbhiCode-247 I’d be happy to assign you this issue! Before that, it would be great if you could join our Slack community and give a ⭐ to the repo: https://github.com/OpsiMate/OpsiMate

[AbhiCode-247]

@idanlodzki Already joined Slack community and starred the repo too.

[AbhiCode-247]

Hi @idanlodzki I've made the changes. Please take a look at my PR.