Fix typo ('sorce' to 'source') (#587)

docs/getting_the_image_info.md

@@ -29,7 +29,7 @@ The source URL can be provided as is, prepended by `/plain/` part:
 /plain/http://example.com/images/curiosity.jpg
 ```
 
-**📝Note:** If the sorce URL contains query string or `@`, you need to escape it.
+**📝Note:** If the source URL contains query string or `@`, you need to escape it.
 
 #### Base64 encoded