Fix typo in website name in docs.

website/docs/index.html.markdown

@@ -64,7 +64,7 @@ The `use_app_oauth_scoped_token` block contains the following arguments:
 
 * `pd_client_id` - (Required) An identifier issued when the Scoped OAuth client was added to a PagerDuty App. It can also be sourced from the `PAGERDUTY_CLIENT_ID` environment variable.
 * `pd_client_secret` - (Required) A secret issued when the Scoped OAuth client was added to a PagerDuty App. It can also be sourced from the `PAGERDUTY_CLIENT_SECRET` environment variable.
-* `pd_subdomain` - (Required) Your PagerDuty account subdomain; i.e: If the *URL* shown by the Browser when you are in your PagerDuty account is some like: https://acme.pagerudty.com, then your PagerDuty subdomain is `acme`. It can also be sourced from the `PAGERDUTY_SUBDOMAIN` environment variable.
+* `pd_subdomain` - (Required) Your PagerDuty account subdomain; i.e: If the *URL* shown by the Browser when you are in your PagerDuty account is some like: https://acme.pagerduty.com, then your PagerDuty subdomain is `acme`. It can also be sourced from the `PAGERDUTY_SUBDOMAIN` environment variable.
 
 ## Example using App Oauth scoped token