Minor typo reported by "Wajenzi"

Author: sondreb

src/Blockcore.Explorer/ClientApp/src/app/api/api.component.html

@@ -1,6 +1,6 @@
 <h1>API</h1>
 <p>
-  This block explorer relies in the API exposed by a blockchain indexer.
+  This block explorer relies on the API exposed by a blockchain indexer.
 </p>
 <p>
   If you'd like to call this API directly, you can read the documentation for here: