Update image.html

Parens inside of parens doesn't work here. Just renders the text on the website, not the link. This is a simple solution that still redirects correctly to Wikipedia.

docs/documentation/elements/image.html

@@ -69,7 +69,7 @@ meta:
 {% include elements/anchor.html name="Responsive images with ratios" %}
 
 <div class="content">
-  <p>If you don't know the exact dimensions but know the <strong>ratio</strong> instead, you can use one of the <strong>16 ratio modifiers</strong>, which include [common aspect ratios in still photography](https://en.wikipedia.org/wiki/Aspect_ratio_(image)#Still_photography):</p>
+  <p>If you don't know the exact dimensions but know the <strong>ratio</strong> instead, you can use one of the <strong>16 ratio modifiers</strong>, which include [common aspect ratios in still photography](https://en.wikipedia.org/wiki/Aspect_ratio_%28image%29#Still_photography):</p>
 </div>
 
 <table id="images" class="table is-bordered">