Fix schema due to changes in issue SAP#582

Author: schneidermic0

file-formats/gsmg/gsmg-v1.json

@@ -27,9 +27,7 @@
           "title": "Original Language",
           "description": "Original language of the ABAP object",
           "type": "string",
-          "minLength": 2,
-          "maxLength": 2,
-          "pattern": "^[a-z]+$"
+          "minLength": 2
         },
         "abapLanguageVersion": {
           "title": "ABAP Language Version",