Update header.client.view.html

Correct spelling

Author: Squ34k3rZ

public/modules/core/views/header.client.view.html

@@ -25,11 +25,11 @@
 		</ul>
 		<ul class="nav navbar-nav navbar-right" data-ng-hide="authentication.user">
 			<li ui-route="/signup" ng-class="{active: $uiRoute}">
-				<a href="/#!/signup">Signup</a>
+				<a href="/#!/signup">Sign Up</a>
 			</li>
 			<li class="divider-vertical"></li>
 			<li ui-route="/signin" ng-class="{active: $uiRoute}">
-				<a href="/#!/signin">Signin</a>
+				<a href="/#!/signin">Sign In</a>
 			</li>
 		</ul>
 		<ul class="nav navbar-nav navbar-right" data-ng-show="authentication.user">
@@ -55,4 +55,4 @@
 			</li>
 		</ul>
 	</nav>
-</div>
+</div>