Update index.html

Author: LeonardoAgasso

index.html

@@ -173,7 +173,7 @@ <h2>Dataset Name — v0.1</h2>
           A test component system
         </p>
         <a class="btn-download"
-           href="https://raw.githubusercontent.com/BioPhys-Turin/component_systems_datasets/tree/main/test.tsv"
+           href="https://raw.githubusercontent.com/BioPhys-Turin/component_systems_datasets/main/test.tsv"
            download>
           ↓ Download CSV
         </a>