Update default.html

Author: sichkar-valentyn

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         <header class="inner">
           <a id="forkme_banner" href="https://github.com/sichkar-valentyn/Reinforcement_Learning_in_Python">View on GitHub</a>
           <img src="/Reinforcement_Learning_in_Python/images/Valentyn-Sichkar.png" alt="Valentyn Sichkar" width="150" height="150" />
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-          <img alt="" width="230" height="230" class="avatar width-full rounded-2" src="https://avatars3.githubusercontent.com/u/34546286?s=460&amp;v=4" />
 
           <h1 id="project_title">Reinforcement Learning in Python</h1>
           <h2 id="project_tagline">Implementing Reinforcement Learning, namely Q-learning and Sarsa algorithms, for global path planning of mobile robot in unknown environment with obstacles. Comparison analysis of Q-learning and Sarsa</h2>