3H - RESOLUTION AUTHORIZING THE COUNTY MAYOR OR COUNTY MAYOR'S DESIGNEE TO EXECUTE SUPPLEMENTAL AGREEMENT NO. 1 BETWEEN AGC ELECTRIC, INC., AND MIAMI-DADE COUNTY (COUNTY) FOR DESIGN-BUILD SERVICES FOR THE REPLACEMENT OF EXISTING SPAN-WIRE SIGNALIZED INTERSECTIONS FOR MAST-ARM CONFIGURATION (ISD PROJECT NO. DB21-DTPW-06; CONTRACT NO. 20210090); INCREASING THE MAXIMUM CONTRACT VALUE TO $10,225,993.43 AND INCREASING THE CONTRACT TERM TO 1,466 NON-COMPENSABLE CALENDAR DAYS AND AUTHORIZING THE COUNTY MAYOR OR COUNTY MAYOR'S DESIGNEE TO EXECUTE SAME AND TO EXERCISE THE RIGHTS CONTAINED THEREIN(Transportation and Public Works)