Update README.md

Author: Royalphax

README.md

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 # Credit Agricole Importer for FireflyIII
 
-Automatic import of Credit Agricole accounts and transactions into FireflyIII personal finance manager, 
+Automatic import of [Credit Agricole](https://www.credit-agricole.fr/) accounts and transactions into FireflyIII personal finance manager, 
 made with use of [python-creditagricole-particuliers](https://github.com/dmachard/python-creditagricole-particuliers).
 
 ## Features