Added Sales Enablement Level Up Webcast Series

Why is this change being made?

Added Sales Enablement Level Up Webcast Series to the list of Field Enablement programs on our team's "home page" on the Handbook. Also re-sequenced so programs are listed in alphabetical order.

@jbrennan1 Thanks in advance for merging!

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what