Add GUI to acronyms appendix per peer review feedback

Author: AdamGohs

docs/desktop-applications/rmc-totalrisk/users-guide/v1.1/15-appendix-acronyms.mdx

@@ -20,7 +20,7 @@ import addBaseUrl from "@docusaurus/useBaseUrl";
   columns={[
     [
       "AALL", "AEP", "ANCOLD", "API", "ASR", "CCA", "CDF", "CHL", "CI", "CPD", "CPU",
-      "DAG", "EAD", "ECB", "EM", "ER", "EqAC", "ERDC", "ERL", "FWOP", "HEC",
+      "DAG", "EAD", "ECB", "EM", "ER", "EqAC", "ERDC", "ERL", "FWOP", "GUI", "HEC",
       "HEC-FDA", "HEC-RAS", "HEC-SSP", "LEC", "MCS", "NED", "NFIP", "OT", "PFM", "PRNG",
       "RMC", "RMC-BestFit", "RMC-RFA", "SRP", "TD", "TR", "TRL", "U.S.", "USACE", "USBR", "WSE"
     ],
@@ -31,7 +31,7 @@ import addBaseUrl from "@docusaurus/useBaseUrl";
       "Central Processing Unit", "Directed Acyclic Graph", "Expected Annual Damage",
       "Engineering and Construction Bulletin", "Engineer Manual", "Engineer Regulation",
       "Equivalent Annual Consequences", "Engineer Research and Development Center",
-      "Effective Record Length", "Future Without Project", "Hydrologic Engineering Center",
+      "Effective Record Length", "Future Without Project", "Graphical User Interface", "Hydrologic Engineering Center",
       "Flood Damage Reduction Analysis Software", "River Analysis System Software",
       "Statistical Software Package Software", "Loss Exceedance Curve", "Monte Carlo Simulation", "National Economic Development",
       "National Flood Insurance Program", "Overtopping", "Potential Failure Mode",