cloud: update the supported AWS regions for full-text search on Starter

ai/guides/vector-search-full-text-search-python.md

@@ -28,7 +28,7 @@ The full-text search feature in TiDB provides the following capabilities:
 
 Full-text search is still in the early stages, and we are continuously rolling it out to more customers. Currently, full-text search is only available on {{{ .starter }}} and {{{ .essential }}} in the following regions:
 
-- AWS: `Frankfurt (eu-central-1)` and `Singapore (ap-southeast-1)`
+- AWS: `Oregon (us-west-2)`, `Tokyo (ap-northeast-1)`, `Frankfurt (eu-central-1)`, and `Singapore (ap-southeast-1)`
 
 To complete this tutorial, make sure you have a {{{ .starter }}} instance in a supported region. If you don't have one, follow [Creating a {{{ .starter }}} instance](/develop/dev-guide-build-cluster-in-cloud.md) to create it.
 

ai/guides/vector-search-full-text-search-sql.md

@@ -28,7 +28,7 @@ The full-text search feature in TiDB provides the following capabilities:
 
 Full-text search is still in the early stages, and we are continuously rolling it out to more customers. Currently, full-text search is only available on {{{ .starter }}} and {{{ .essential }}} in the following regions:
 
-- AWS: `Frankfurt (eu-central-1)` and `Singapore (ap-southeast-1)`
+- AWS: `Oregon (us-west-2)`, `Tokyo (ap-northeast-1)`, `Frankfurt (eu-central-1)`, and `Singapore (ap-southeast-1)`
 
 Before using full-text search, make sure your {{{ .starter }}} instance is created in a supported region. If you don't have one, follow [Creating a {{{ .starter }}} instance](/develop/dev-guide-build-cluster-in-cloud.md) to create it.
 

ai/guides/vector-search-hybrid-search.md

@@ -21,7 +21,7 @@ This tutorial demonstrates how to use hybrid search in TiDB with the [pytidb](ht
 
 Full-text search is still in the early stages, and we are continuously rolling it out to more customers. Currently, full-text search is only available on {{{ .starter }}} and {{{ .essential }}} in the following regions:
 
-- AWS: `Frankfurt (eu-central-1)` and `Singapore (ap-southeast-1)`
+- AWS: `Oregon (us-west-2)`, `Tokyo (ap-northeast-1)`, `Frankfurt (eu-central-1)`, and `Singapore (ap-southeast-1)`
 
 To complete this tutorial, make sure you have a {{{ .starter }}} instance in a supported region. If you don't have one, follow [Creating a {{{ .starter }}} instance](/develop/dev-guide-build-cluster-in-cloud.md) to create it.