remove extra newlines

static/usage.html

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             sandbox at all) and lacks support for isolating sites from each other rather than only
             containing content as a whole.</p>
 
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             <h2 id="camera">
                 <a href="#camera">Camera</a>
             </h2>
 
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             <p>The Camera app included in GrapheneOS is very basic and can't take full advantage
             of the hardware. It doesn't offer much in the way of configuration. In the long term,
             it's going to be replaced. In the short term, there are other apps available providing