Williams-Sonoma Profit Up; Stock Jumps  CHICAGO (Reuters) - Williams-Sonoma Inc. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=WSM.N target=/stocks/quickinfo/fullquote"&gt;WSM.N&lt;/A&gt; on  Wednesday posted a better-than-expected 55 percent increase in  quarterly profit, sending its stock up 10 percent, as sales  jumped at its Pottery Barn chain.