spelling fix intances -> instances (#403)

zkoppert · web-flow · commit f451ae20d978 · 2022-04-02T08:56:29.000+03:00
diff --git a/patterns/2-structured/document-your-guiding-principles.md b/patterns/2-structured/document-your-guiding-principles.md
@@ -204,7 +204,7 @@ Structured
 
 ## Acknowledgements
 
-* Zack Koppert - for sharing GitHub's approach in the Known Intances
+* Zack Koppert - for sharing GitHub's approach in the Known Instances
 
 ## Alias
 
