Adjust the maximum resolution used in GeoHexVisitorTests (#102804) (#102820)

Author: iverase

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

@@ -51,7 +51,7 @@ private void doTestGeometry(LongFunction<Geometry> h3ToGeometry, boolean hasArea
         // we ignore polar cells are they are problematic and do not keep the relationships
         long h3 = randomValueOtherThanMany(
             l -> l == H3.geoToH3(90, 0, H3.getResolution(l)) || l == H3.geoToH3(-90, 0, H3.getResolution(l)),
-            () -> H3.geoToH3(GeoTestUtil.nextLatitude(), GeoTestUtil.nextLongitude(), randomIntBetween(2, 14))
+            () -> H3.geoToH3(GeoTestUtil.nextLatitude(), GeoTestUtil.nextLongitude(), randomIntBetween(2, 13))
         );
         long centerChild = H3.childPosToH3(h3, 0);
         // children position 3 is chosen so we never use a polar polygon