Change en translate file

Author: jdieguez89

frontend/src/i18n/en.json

@@ -133,7 +133,7 @@
     "newDir": "New rule directory",
     "newDirMessage": "Write the name of the new directory.",
     "newFile": "New rule file",
-    "newFileMessage": "Write the name of the new file.",
+    "newFileMessage": "Write the name of the new rule file.",
     "numberDirs": "Number of directories",
     "numberFiles": "Number of files",
     "rename": "Rename",