doc: fix

README.rst

@@ -1,14 +1,10 @@
 xxl-jobs 的python客户端实现
 =============================
 
-.. raw:: html
-
-    <a href="https://pypi.org/project/pyxxl" target="_blank">
-        <img src="https://img.shields.io/pypi/v/pyxxl?color=%2334D058&label=pypi%20package" alt="Package version">
-    </a>
-    <a href="https://pypi.org/project/pyxxl" target="_blank">
-        <img src="https://img.shields.io/pypi/pyversions/pyxxl.svg?color=%2334D058" alt="Supported Python versions">
-    </a>
+.. image:: https://img.shields.io/pypi/v/pyxxl?color=%2334D058&label=pypi%20package
+    :target: https://pypi.org/project/pyxxl
+.. image:: https://img.shields.io/pypi/pyversions/pyxxl.svg?color=%2334D058
+    :target: https://pypi.org/project/pyxxl
 
 
 使用pyxxl可以方便的把Python写的方法注册到xxl-job中，使用xxl-job-admin管理Python定时任务和周期任务