docs/configuration: Fix profile_credentials AWS docs (#4831)

Signed-off-by: Li Wang <li.wang3@fmr.com>

docs/content/configuration.md

@@ -463,7 +463,7 @@ request OPA will re-read the credentials from the file and use them for authenti
 | --- | --- | --- | --- |
 | `services[_].credentials.s3_signing.profile_credentials.path` | `string` | No | The path to the shared credentials file. If empty, OPA will look for the `AWS_SHARED_CREDENTIALS_FILE` env variable. If the variable is not set, the path defaults to the current user's home directory. `~/.aws/credentials` (Linux & Mac) or `%USERPROFILE%\.aws\credentials` (Windows) |
 | `services[_].credentials.s3_signing.profile_credentials.profile` | `string` | No | AWS Profile to extract credentials from the credentials file. If empty, OPA will look for the `AWS_PROFILE` env variable. If the variable is not set, the `default` profile will be used |
-| `services[_].credentials.s3_signing.metadata_credentials.aws_region` | `string` | No | The AWS region to use for the AWS signing service credential method. If unset, the `AWS_REGION` environment variable must be set |
+| `services[_].credentials.s3_signing.profile_credentials.aws_region` | `string` | No | The AWS region to use for the AWS signing service credential method. If unset, the `AWS_REGION` environment variable must be set |
 
 ##### Using EC2 Metadata Credentials
 If specifying `metadata_credentials`, OPA will use the AWS metadata services for [EC2](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/iam-roles-for-amazon-ec2.html)