add note about escaping on powershell

_includes/guide/try_the_api.html

@@ -11,7 +11,7 @@
 	All requests for BCDA data follow this four step process, as do other APIs following the Bulk FHIR specifications.
 </p>
 <p>
-	For more detail for each of these steps and specific information for retrieving production data, see the <a href=/build.html target="_self" class="in-text__link"> Building Your Application</a> page. For this short demo, follow along in your Terminal window or through an application such as Postman.
+	For more detail for each of these steps and specific information for retrieving production data, see the <a href=/build.html target="_self" class="in-text__link"> Building Your Application</a> page. For this short demo, follow along in your Terminal window or through an application such as Postman. Powershell users will need to replace backslash characters \ with backticks ` to properly escape the $export operation.
 </p>
 
 <h2>