docs: update readme logo img path

Author: spwoodcock

README.md

@@ -2,7 +2,7 @@
 
 <!-- markdownlint-disable -->
 <p align="center">
-  <img src="https://github.com/hotosm/fmtm/blob/main/images/hot_logo.png?raw=true" style="width: 200px;" alt="HOT"></a>
+  <img src="https://raw.githubusercontent.com/hotosm/fmtm/main/docs/images/hot_logo.png" style="width: 200px;" alt="HOT"></a>
 </p>
 <p align="center">
   <em>A utility for splitting an AOI into multiple tasks.</em>