ZOOKEEPER-4402: Added Hyperlink At LOGO

Inserted a hyperlink AT logo
So that users can easily be redirected to the SITE

Author: gautammsuthar <69046800+gautammsuthar@users.noreply.github.com>

Reviewers: maoling <maoling@apache.org>

Closes #1771 from gautammsuthar/patch-1

README.md

@@ -1,5 +1,10 @@
 # Apache ZooKeeper [![GitHub Actions CI][ciBadge]][ciLink] [![Travis CI][trBadge]][trLink] [![Maven Central][mcBadge]][mcLink] [![License][liBadge]][liLink]
-![alt text](https://zookeeper.apache.org/images/zookeeper_small.gif "ZooKeeper")
+
+<p align="left">
+  <a href="https://zookeeper.apache.org/">
+    <img src="https://zookeeper.apache.org/images/zookeeper_small.gif"" alt="https://zookeeper.apache.org/"><br/>
+  </a>
+</p>
 
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