update project description

Author: Traitanit Huangsri

setup.py

@@ -27,7 +27,7 @@
 setup(
     name='robotframework-jsonlibrary',
     version=VERSION,
-    description="robotframework json jsonpath",
+    description="robotframework-jsonlibrary is a Robot Framework test library for manipulating JSON Object. You can manipulate your JSON object using JSONPath",
     author="Traitanit Huangsri",
     author_email='[email protected]',
     url='https://github.com/nottyo/robotframework-jsonlibrary.git',