fix typo

Author: Tadayuki Onishi

docs/resources/conditional_access_policy.md

@@ -178,7 +178,7 @@ The following arguments are supported:
 * `included_applications` - (Optional) A list of application IDs the policy applies to, unless explicitly excluded (in `excluded_applications`). Can also be set to `All`, `None` or `Office365`. Cannot be specified with `included_user_actions`. One of `included_applications`, `included_user_actions` or `include_authentication_context_class_references` must be specified.
 * `filter` - (Optional) A `filter` block as described below.
 * `included_user_actions` - (Optional) A list of user actions to include. Supported values are `urn:user:registerdevice` and `urn:user:registersecurityinfo`. Cannot be specified with `included_applications`. One of `included_applications`, `included_user_actions` or `include_authentication_context_class_references` must be specified.
-* `include_authentication_context_class_references` - (Optional) A list of authenticaton context class reference to include. Supported values are `c1` through `c99`.
+* `include_authentication_context_class_references` - (Optional) A list of authentication context class reference to include. Supported values are `c1` through `c99`.
 
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