Replace the S3 Bahrain target with Mumbai (closes #205)

s3.me-south-1.amazonaws.com accepts no connection, so its row timed out
on every check and a healthy network showed 25/26. S3 ap-south-1
(Mumbai) answers HEAD /robots.txt with 403 and no redirect.

Model: opus-5-5

web/src/main.js

@@ -99,8 +99,8 @@ const WAN_HOSTS = [
         method: "HEAD",
     },
     {
-        name: "S3 me-south-1 (Bahrain)",
-        url: "https://s3.me-south-1.amazonaws.com/robots.txt",
+        name: "S3 ap-south-1 (Mumbai)",
+        url: "https://s3.ap-south-1.amazonaws.com/robots.txt",
         method: "HEAD",
     },
     {