fix path to logo (#509)

Author: maxulysse

README.md

@@ -8,7 +8,7 @@
   <a href="https://nextflow.io/">
     <picture>
         <source media="(prefers-color-scheme: dark)" width="350" srcset="https://github.com/seqeralabs/logos/blob/master/nextflow/nextflow_logo_color_darkbg.png?raw=true">
-        <img alt="Nextflow Logo" width="350" src="https://github.com/seqeralabs/logos/blob/master/nextflow/nextflowc_logo_color.png?raw=true">
+        <img alt="Nextflow Logo" width="350" src="https://github.com/seqeralabs/logos/blob/master/nextflow/nextflow_logo_color.png?raw=true">
     </picture>
   </a>
 </p>