fix: solves bug where precision is allowed to be too high

Limits the precision in containingGeohash function to 6 from 24
since the toGeohash function has been updated to only work for
highest precision 6.

src/main/java/com/esri/core/geometry/Geohash.java

@@ -192,7 +192,7 @@ public static String containingGeohash(Envelope2D envelope) {
     double deltaLon = 360;
     double deltaLat = 180;
 
-    while (xmin == xmax && ymin == ymax && chars < 25) {
+    while (xmin == xmax && ymin == ymax && chars < 7) {
       if (chars % 2 == 0) {
         deltaLon = deltaLon / 8;
         deltaLat = deltaLat / 4;