fix: modify logo style (#24)

Co-authored-by: echoOikawa <[email protected]>

Author: echoOikawa

.dumi/overrides.less

@@ -10,4 +10,13 @@
       margin-bottom: 0 !important;
     }
   }
+
+  .dumi-default-logo img {
+    height: 30px;
+  }
+
+  .dumi-default-header-left{
+    display: flex;
+    align-items: center;
+  }
 }