Platinum sponsors round2

[erral]

• I signed and returned the Plone Contributor Agreement, and received and accepted an invitation to join a team in the Plone GitHub organization.
• I verified there aren't any other open pull requests for the same change.
• I followed the guidelines in Contributing to Plone.
• I successfully ran code quality checks on my changes locally.
• I successfully ran tests on my changes locally.
• If needed, I added new tests for my changes.
• If needed, I added documentation for my changes.
• I included a change log entry in my commits.

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After merging the previous #246 we found that we need some minor wording changes and more margin for the footer. This Pr addresses it.

@astridjuizi

This is the home page

This is a sponsor's page

[stevepiercy]

@astridjuizi I can't add you as a reviewer or autocomplete your username.

@erral can you discuss amongst the appropriate team whether Astrid can be added to this repo under some team or group where we can assign her as a reviewer and tag her? Perhaps Plone.org or plone/marketing-communications team?

[erral]

These are the screenshots of testing.plone.org with the said changes

Home

What is Plone

Sponsor page

@Fosten @astridjuizi

[astridjuizi]

That sponsor logo size looks much much better. The text also flows nicely. The "Your Logo Here" with the dotted outline looks good and balances the current single logo, and gives a feeling of space to invite others to get their logo there. LGTM

[Fosten]

LGTM

[erral]

Thanks, let's deploy this to plone.org and see how it behaves there.