Fix examplePage config.toml and edit Readme

exampleSite/config.toml

@@ -1,17 +1,13 @@
 baseurl = "https://example.org/"
 languageCode = "en-us"
 title = "Hello Friend"
-theme = "hello-friend"
+theme = "hugo-theme-hello-friend"
 copyright = ""
 paginate = 5
 
 [params]
   subtitle = "A simple theme for Hugo"
 
-# [params.logo]
-#   path = "/img/your-example-logo.svg"
-#   alt = "your_example_logo"
-
 [menu]
   [[menu.main]]
     identifier = "about"
@@ -20,4 +16,4 @@ paginate = 5
   [[menu.main]]
     identifier = "showcase"
     name = "Showcase"
-    url = "/showcase"
+    url = "/showcase"