fix(GarageIcon): correct size

Going through all other icons to see which had a  viewbox that matched the width + height  and found only two: icon-garage and icon-up-right-arrow. icon-up-right-arrow had sizing explicitly set in CSS and was not affected. icon-garage defaulted to the leaflet default marker size of 12x12. This explicitly sets the iconSize to 21x25, matching what is specified in the SVG. I noticed that the width and height SVG properties are being removed as part of [svg-inline-loader](https://github.com/webpack-contrib/svg-inline-loader/tree/4bb5529fbdd847d7809067fe11840b48ee13dde4#removesvgtagattrs-boolean). I thought about turning off that behavior as part of this PR, but it seems like it could affect more icons and I'm not really sure if it is necessary

assets/src/components/mapMarkers.tsx

@@ -332,6 +332,7 @@ const garageLeafletIcon = Leaflet.divIcon({
   html: garageIcon,
   className: "m-garage-icon",
   iconAnchor: new Leaflet.Point(10, 25),
+  iconSize: [21, 25],
 })
 
 const Garage = ({