🎨 logo update

src/main/webapp/admin-about.ftl

@@ -5,7 +5,7 @@
     <div class="module-body padding12">
         <div class="about-logo">
             <a href="http://b3log.org" target="_blank">
-                <img src="${staticServePath}/images/logo.jpg" alt="Solo" title="Solo" />
+                <img width="128" src="${staticServePath}/images/logo.png" alt="Solo" title="Solo" />
             </a>
         </div>
         <div class="left content-reset" style="width: 73%">

src/main/webapp/macro-common-page.ftl

@@ -17,7 +17,7 @@
     <div class="content">
         <div class="logo">
             <a href="http://b3log.org" target="_blank">
-                <img border="0" alt="Solo" title="Solo" src="${staticServePath}/images/logo.jpg"/>
+                <img width="128" border="0" alt="Solo" title="Solo" src="${staticServePath}/images/logo.png"/>
             </a>
         </div>
         <div class="main">