Add visible anchor links to project list page

[sagesharp]

In the project-selection page, there are anchor tags for each community. These anchors allow you to link directly to a community's project list. E.g.

https://www.outreachy.org/apply/project-selection/#apache

(If Apache was participating in the current round.)

Mentors don't know they can link directly to their project list. Make the anchor tags more visible on the page like we do with the documentation section anchors. Make the section headers have the same formatting as this:

https://www.outreachy.org/docs/applicant/#what-is-outreachy

The project-selection page HTML template is here:

https://github.com/outreachy/website/blob/master/home/templates/home/round_page_with_communities.html#L136

You can see how the anchor tags are formatted here:

https://github.com/outreachy/website/blob/master/home/templates/home/docs/applicant_guide.html#L37

Related to #204

[impeccable16]

hey @sagesharp I am new here , could you please tell me what I have to do in this issue?

Thanks and Regards