Add information about Competitive analysis to Release UX Strategy

Why is this change being made?

This MR adds information about:

• What we value competitive analysis for.
• How we are conducting Competitive analysis on Release, as well as a link reference to Release Management epic that tracks all competitive analysis conducted to this point.

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