Merge pull request #1677 from cdrage/fix-grammar

Update grammar for "Create an Issue" and "Edit this Page"

_layouts/docwithnav.html

@@ -52,8 +52,8 @@
 	        (function(d,c,j){if(!document.getElementById(j)){var pd=d.createElement(c),s;pd.id=j;pd.src=('https:'==document.location.protocol)?'https://polldaddy.com/js/rating/rating.js':'http://i0.poll.fm/js/rating/rating.js';s=document.getElementsByTagName(c)[0];s.parentNode.insertBefore(pd,s);}}(document,'script','pd-rating-js'));
 		</script>
 		<a href="" onclick="window.open('https://github.com/kubernetes/kubernetes.github.io/issues/new?title=Issue%20with%20' +
-		window.location.pathname)" class="button issue">Create Issue</a>
-		<a href="/editdocs#{{ page.path }}" class="button issue">Edit This Page</a>
+		window.location.pathname)" class="button issue">Create an Issue</a>
+		<a href="/editdocs#{{ page.path }}" class="button issue">Edit this Page</a>
 	{% endif %}
 	</div>
 </section>