docs: add ap-south-1 (Mumbai) region to available regions (FIR-51060) (#1101)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: [email protected] <[email protected]>

Author: devin-ai-integration[bot]

docs-mdx/reference/available-regions.mdx

@@ -10,10 +10,11 @@ Firebolt is available in the following AWS regions:
 | Region name              | Region ID      |
 |:-------------------------|:---------------|
 | US West (Oregon)         | us-west-2      |
-| US East (N. Virginia)     | us-east-1      |
-| Europe (Frankfurt)   | eu-central-1   |
-| Europe (Ireland)        | eu-west-1      |
+| US East (N. Virginia)    | us-east-1      |
+| Europe (Frankfurt)       | eu-central-1   |
+| Europe (Ireland)         | eu-west-1      |
 | Asia Pacific (Singapore) | ap-southeast-1 |
+| Asia Pacific (Mumbai)    | ap-south-1     |
 
 To request additional regions, contact Firebolt's support team at [[email protected]](mailto:[email protected]).