Use Kannapolis City Hall photo in the Kannapolis section

Replace the generic stock image with a cropped 3:2 shot of Kannapolis City
Hall (source: Wikimedia Commons), trimmed to center the building, flags, and
plaza. Update alt text and remove the now-unused kannapolis-nc.jpg.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

index.html

@@ -218,7 +218,7 @@
           <p>The town is conveniently located right off I-85, within 30 minutes of uptown Charlotte and Charlotte Douglas International Airport. With growing businesses, a vast array of shops and restaurants, a beautiful downtown, sought-after Cabarrus County and private schools, and the grandeur of the NC Research Campus, Kannapolis is a wonderful place to call home.</p>
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-          <img class="feature-img" src="img/kannapolis-nc.jpg" alt="Downtown Kannapolis, North Carolina" loading="lazy" decoding="async">
+          <img class="feature-img" src="img/kannapolis-city-hall.jpg" alt="Kannapolis City Hall in downtown Kannapolis, North Carolina" loading="lazy" decoding="async">
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