Update title (#606)

docs: In the doc content this is referred to as the "configuration file" and this feels like a more natural title

docs/www/docs/cli/swa-config.md

@@ -1,6 +1,6 @@
 ---
 sidebar_position: 8
-title: Configuring file
+title: Configuration file
 ---
 
 ## `swa-cli.config.json`