Minor updates to the CEO Shadow page

Why is this change being made?

Making some minor changes to the CEO shadow page to conform with writing style guidelines as well as documenting rideshare information from SFO which may help expedite coordination for team members not familiar with SFO.

Changes made:

• Fixing a "you" to a "your" for the sentence to read correctly
• Add details related to coordinating arrival/rideshare @ SFO if arriving at different terminals
• Create crosslink from the Traveling w/ CEO section to Rideshare section
• Update spelling from travelling to traveling as we use American English spelling per comm guidelines

Does this MR meet the acceptance criteria?

Conformity

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