fix: use double instead of float

Co-authored-by: M. Fatih Cırıt <xmfcx@users.noreply.github.com>

Author: KhalilSelyan

Diff for: common/autoware_overlay_rviz_plugin/autoware_overlay_rviz_plugin/src/gear_display.cpp

@@ -87,7 +87,7 @@ void GearDisplay::drawGearIndicator(QPainter & painter, const QRectF & backgroun
   borderPen.setWidth(1);
   painter.setPen(borderPen);
 
-  float gearBoxSize = 37.5;
+  double gearBoxSize = 37.5;
   double gearX = backgroundRect.left() + 54;
   double gearY = backgroundRect.height() / 2 - gearBoxSize / 2.0;
   QRect gearRect(gearX, gearY, gearBoxSize, gearBoxSize);