[css-nav-1] Spell check.

Author: dbaron

css-nav-1/Overview.bs

@@ -930,7 +930,7 @@ The <a>navigation-override</a> <a>policy-controlled feature</a></h2>
 	the navigation events (see [[#events-navigationevent]]) will not be fired.
 
 	Note: This is to prevent a hostile iframe from using these events
-	in order to highjack the focus.
+	in order to hijack the focus.
 	We recognize that there exist other mechanisms predating spatial navigation
 	that malicious the author could use
 	to interfere with the user's ability to control where the focus goes.
@@ -1657,7 +1657,7 @@ all known potential security risks associated with this specification
 have been adequately addressed.
 Further details are provided below.
 
-The TAG has developed a self-review questionaire
+The TAG has developed a self-review questionnaire
 to help editors and Working Groups evaluate the risks introduced by their specifications.
 Answers are provided below.
 
@@ -1707,7 +1707,7 @@ Answers are provided below.
     Some control is given over how the User Agent performs spatial navigation,
     which may be considered part of its user interface.
     This is intentional, to let the author tailor the behavior of spatial navigation to their pages.
-    To prevent malicious the author to interefere with the users' desire to control focus and navigate the document,
+    To prevent malicious the author to interfere with the users' desire to control focus and navigate the document,
     this overriding mechanism is disabled by default for cross-origin iframes.
     See [[#policy-feature]].