Improve README header layout

Author: rmitsch

README.md

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-<img src="https://raw.githubusercontent.com/mantisai/sieves/main/docs/assets/sieve.png" width="230" align="left" style="margin-right:60px" />
-<img src="https://raw.githubusercontent.com/mantisai/sieves/main/docs/assets/sieves_sieve_style.png" width="350" align="left" style="margin-right:60px" />
+<p>
+  <img src="https://raw.githubusercontent.com/mantisai/sieves/main/docs/assets/sieve.png" width="150" align="left" />
+  <span>
+        <br>
+        <h1>
+              &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<code>sieves<br></code>&nbsp;&nbsp;&nbsp;<br>
+              &nbsp;
+        </h1>
+  </span>
+</p>
 
-<br clear="all"/>
-<br>
 
 [![GitHub Actions Workflow Status](https://img.shields.io/github/actions/workflow/status/mantisai/sieves/test.yml)](https://github.com/mantisai/sieves/actions/workflows/test.yml)
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 ![Status](https://img.shields.io/pypi/status/sieves)
 -->
 
+<br>
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 ## A Unified Interface for Document AI.
 
 `sieves` provides a **framework-agnostic abstraction for building document AI pipelines**.