fix: update retired /email-routing/ cross-references to /email-service/

Author: MohamedH1998

src/content/docs/dns/faq.mdx

@@ -109,7 +109,7 @@ Free zones created before 2024-09-01 00:00:00 UTC have an increased limit of 1,0
 If you are an Enterprise customer and require more DNS records, contact your account team. Cloudflare can support millions of DNS records on a single zone.
 :::
 
-DNS records that other Cloudflare services create on your behalf — for example, the `TXT` and `MX` records added by [Email Routing](/email-routing/) — also count toward this limit. To avoid disrupting those services, they are enforced against your record limit with a small buffer, so a zone may occasionally hold slightly more records than its limit would otherwise allow.
+DNS records that other Cloudflare services create on your behalf — for example, the `TXT` and `MX` records added by [Email Routing](/email-service/) — also count toward this limit. To avoid disrupting those services, they are enforced against your record limit with a small buffer, so a zone may occasionally hold slightly more records than its limit would otherwise allow.
 
 To create new records yourself through the dashboard or API, your zone must still be within its record limit.
 

src/pages/index.astro

@@ -177,7 +177,7 @@ const sidebar = [
 					{ label: "DNS", link: "/dns/" },
 					{ label: "1.1.1.1", link: "/1.1.1.1/" },
 					{ label: "Registrar", link: "/registrar/" },
-					{ label: "Email Routing", link: "/email-routing/" },
+					{ label: "Email Routing", link: "/email-service/" },
 					{ label: "DMARC Management", link: "/dmarc-management/" },
 				],
 			},