Update Overview.bs (w3c#8836)

Author: TKDev7

css-syntax-3/Overview.bs

@@ -2113,7 +2113,7 @@ Parser Entry Points</h3>
 				"<a>Parse a declaration</a>" is used in ''@supports'' conditions. [[CSS3-CONDITIONAL]]
 
 			<li>
-				"<a>Parse a block's contents</a>" is inteded for parsing the contents of any block in CSS
+				"<a>Parse a block's contents</a>" is intended for parsing the contents of any block in CSS
 				(including things like the style attribute},
 				and APIs such as {{CSSStyleDeclaration/cssText|the CSSStyleDeclaration cssText attribute}}.