Fixed typos in READMEs.

README.fr.md

@@ -71,7 +71,7 @@ terminal dans le dossier du projet et exécutez :
 ```
 ou, sur Microsoft Windows,
 ```
-.`gradlew stop
+.\gradlew stop
 ```
 
 ### Appel de l'API

README.md

@@ -32,7 +32,7 @@ It is recommended to use a Java IDE to run and deploy the application.
 
 #### Preparing
 
-Make sure you have at least a Java Development Kit version **8** installed on your machine.
+Make sure you have a Java Development Kit version **8 or later** installed on your machine.
 You must have the full JDK to build the program. You can deploy the WAR file on a machine 
 with the JRE only.