🐛 Fix TypeScript syntax, update IP condition

src/update.ts

@@ -156,19 +156,18 @@ export const update = async (shouldCommit = false) => {
         try {
           let status: "up" | "down" | "degraded" = "up";
           // https://github.com/upptime/upptime/discussions/888
-          const url = replaceEnvironmentVariables(site.url),
-          let address;
-          if (isIP(url)) {
+          const url = replaceEnvironmentVariables(site.url);
+          let address = url;
+          if (isIP(url) {
             if (site.ipv6 && !isIPv6(url))
-              throw Error('Site URL must be IPv6 for ipv6 check');
-            address = url;
-          } else {
-            if (site.ipv6)
+              throw new Error("Site URL must be IPv6 for ipv6 check");
+            else if (site.ipv6)
               address = (await dns.promises.resolve6(url))[0];
             else
               address = (await dns.promises.resolve4(url))[0];
-            if (!isIP(address))
-              throw Error('Site IP address could not be resolved');
+
+            if (isIP(url) && !isIP(address))
+              throw new Error("Site IP address could not be resolved");
           }
 
           const tcpResult = await ping({