Add/Update Information on Events

[st3phhays]

Description Of Changes

This updates the flyout information for both recurring Livestreams as
well as information about new upcoming webinar. This also adds a top
alert banner that drives users to the new webinar page.

Motivation and Context

We have new event times and a event that need updated.

Testing

Testing steps can be found at: https://github.com/chocolatey/chocolatey.org/pull/293

Operating Systems Testing

Change Types Made

• Bug fix (non-breaking change).
• Feature / Enhancement (non-breaking change).
• Breaking change (fix or feature that could cause existing functionality to change).
• Documentation changes.
• PowerShell code changes.

Change Checklist

• Requires a change to the documentation.
• Documentation has been updated.
• Tests to cover my changes, have been added.
• All new and existing tests passed?
• PowerShell code changes: PowerShell v2 compatibility checked?

Related Issue

• https://github.com/chocolatey/img/pull/6
• https://github.com/chocolatey/chocolatey.org/pull/293

[st3phhays]

Results will look similar to the below screenshots.

• Note that the "Learn More" button on the webinar listing will actually be an outlined button (this was fixed after noticing it was wrong in the screenshot).
• We decided to remove the yellow top banner. It will not be in the preview.