message: fix header weight
diff: @@ -81,7 +81,7 @@ limitations under the License.
  line-height: 52px;
  color: $roomheader-color;
  font-size: 18px;
  - font-weight: bold;
  + font-weight: 600;
  overflow: hidden;
  margin-left: 63px;
  text-overflow: ellipsis;
  @@ -101,7 +101,7 @@ limitations under the License.
  .mx_RoomHeader_name {
  overflow: hidden;
  color: $roomheader-color;
  - font-weight: bold;
  + font-weight: 600;
  font-size: 18px;
  padding-left: 15px;
  padding-right: 15px;
  