Fix broken frag-ID link

Author: csswizardry

_config.yml

@@ -4,7 +4,7 @@ email: [email protected]
 description: "High-level advice and guidelines for writing sane, manageable, scalable CSS"
 baseurl: ""
 url: "http://cssguidelin.es"
-version: 2.2.0
+version: 2.2.1
 
 # Build settings
 markdown: kramdown

index.md

@@ -2177,8 +2177,8 @@ particularly considering the move toward component-based UIs. It will mean you
 can more easily recycle and reuse functionality, as well rapidly construct
 larger parts of UI from a known set of composable objects. Think back to our
 error message example in the [Single Responsibility
-Principle](#single-responsibility-principle) section; we created a complete UI
-component by composing a number of much smaller and unrelated objects.
+Principle](#the-single-responsibility-principle) section; we created a complete
+UI component by composing a number of much smaller and unrelated objects.
 
 ### The Separation of Concerns