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

README.md

@@ -57,7 +57,7 @@ The page checks 26 hosts on the internet, the WAN hosts:
 - the Anthropic API and the OpenAI API
 - the AWS Console, the Google Cloud Console and Microsoft Azure
 - Cloudflare, Fastly, Akamai, Google, GitHub and Backblaze B2
-- 8 S3 regional endpoints: Cape Town, London, Bahrain, Tokyo, Singapore, Sydney,
+- 8 S3 regional endpoints: Cape Town, London, Mumbai, Tokyo, Singapore, Sydney,
   Oregon and São Paulo
 - 6 Hetzner speed-test servers: Nuremberg, Falkenstein, Helsinki, Ashburn,
   Hillsboro and Singapore