Increase GeoHexGridTiler#FACTOR (#101142)

we added a more aggressive way to handle geotile boundaries which affects the correction factor for GeoHexGridTiler.

Author: iverase

x-pack/plugin/spatial/src/main/java/org/elasticsearch/xpack/spatial/search/aggregations/bucket/geogrid/GeoHexGridTiler.java

@@ -240,7 +240,7 @@ static class BoundedGeoHexGridTiler extends GeoHexGridTiler {
         private final GeoBoundingBox bbox;
         private final GeoHexVisitor visitor;
         private final int resolution;
-        private static final double FACTOR = 0.36;
+        private static final double FACTOR = 0.37;
 
         BoundedGeoHexGridTiler(int resolution, GeoBoundingBox bbox) {
             super(resolution);