Update "Project Team" to "Customer Team" in left sidebar

[ajefts]

In the left sidebar, update language of "Project Team" to "Customer Team." This will help to more clearly indicate to Topcoder users where they should be adding themselves and inviting other Topcoder users.

[ajefts]

Link to feature: https://tcprod.productboard.com/feature-board/planning/features/1797297

[RishiRajSahu]

Done with 2212cd2