Update GCPProvisionerSettings.tsx (#3492)

dashboard/src/components/GCPProvisionerSettings.tsx

@@ -41,6 +41,7 @@ import PreflightChecks from "./PreflightChecks";
 
 const locationOptions = [
   { value: "us-east1", label: "us-east1 (South Carolina, USA)" },
+  { value: "us-east4", label: "us-east4 (Virginia, USA)" },
   { value: "asia-south1", label: "asia-south1 (Mumbia, India)" },
 ];
 
@@ -553,4 +554,4 @@ const ExpandHeader = styled.div<{ isExpanded: boolean }>`
     props.isExpanded ? "rotate(0deg)" : "rotate(-90deg)"};
     transition: transform 0.1s ease;
   }
-`;
+`;