docs: fix simple typo, libary -> library

There is a small typo in templates/docs/python.md.

Should read `library` rather than `libary`.

templates/docs/python.md

@@ -12,7 +12,7 @@ except requests.RequestException as e:
     print("Ping failed: %s" % e)
 ```
 
-Otherwise, you can use the urllib module from Python 3 standard libary:
+Otherwise, you can use the urllib module from Python 3 standard library:
 
 ```python
 import socket