Update the GEAR Manager warning text to match the additional verbiage added (e.g. CUI text)

@joshsjurik Josh, I will make this change to the production (master) branch. Would you please make this change to the fwdDev branch?

On the GEAR Manager login page (currently at: https://ea.gsa.gov/#/gear_manager) the text should read:

> `************************************WARNING************************************`
> This is a U.S. General Services Administration Federal Government computer system that is "FOR OFFICIAL USE ONLY." This system is subject to monitoring. Therefore, no expectation of privacy is to be assumed. Individuals found performing unauthorized activities may be subject to disciplinary action including criminal prosecution.
>
> This system contains Controlled Unclassified Information (CUI). All individuals viewing, reproducing or disposing of this information are required to protect it in accordance with 32 CFR Part 2002 and GSA Order CIO 2103.1 CUI Policy.