Update nightfall theme configuration and submodule reference

config-nightfall.toml

@@ -37,6 +37,7 @@ theme = "nightfall"
   user = "hello"
   hostname = "gohugo.io"
   sitedescription = "Minimal dark theme for Hugo"
+  openLinksInNewTab = false
 
   openLinksInNewTab = true
 
@@ -56,7 +57,7 @@ theme = "nightfall"
     avatarFirst = true
 
   [params.styles]
-    color = "blue"
+    color = "orange"
 
 # footerHtml = 'CC BY-SA 4.0, Built with <a href="https://gohugo.io" class="footerLink">Hugo</a> and <a href="https://github.com/LordMathis/hugo-theme-nightfall" class="footerLink">Nightfall</a> theme'