Add a link to the Wiki in owntech.ini so that information on how to use the...

Add a link to the Wiki in owntech.ini so that information on how to use the libraries is directly accessible.

src/owntech.ini

@@ -3,6 +3,9 @@
 #
 # To enable a library, simply uncomment the corresponding line.
 #
+# Information about how to use the libraries is available on OwnTech Wiki:
+# https://gitlab.laas.fr/owntech/power-api/core/-/wikis/OwnTech%20Power%20API%20Libraries
+#
 
 [env]