typo exmple -> example (#638)

Author: kevaundray

src/web/clients/download/partial.md

@@ -5,7 +5,7 @@
 Uses [`reqwest::blocking::Client::head`] to get the [Content-Length] of the response.
 
 The code then uses [`reqwest::blocking::Client::get`] to download the content in
-chunks of 10240 bytes, while printing progress messages. This exmple uses the synchronous
+chunks of 10240 bytes, while printing progress messages. This example uses the synchronous
 reqwest module.  The [Range] header specifies the chunk size and position.
 
 The Range header is defined in [RFC7233][HTTP Range RFC7233].