fix typo

Author: cmontella

_layouts/default.html

@@ -65,7 +65,7 @@ <h1><img alt="EVE" src="https://witheve.github.io/assets/images/wordmark.svg" />
 
                                         <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#aggregates">Aggregates</a></li>
                                         <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#math">Math</a></li>
-                                        <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#stirngs">Strings</a></li>
+                                        <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#strings">Strings</a></li>
                                         <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#html">HTML</a></li>
                                         <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#canvas">Canvas</a></li>
                                         <li><a href="{{ site.url }}/v0.3/handbook/libraries/stdlib/#ui">UI</a></li>