Fix docs links

Author: craigtaverner

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/spatial/StGeohash.java

@@ -118,7 +118,7 @@ private static int checkPrecisionRange(int precision) {
         description = """
             Calculates the `geohash` of the supplied geo_point at the specified precision.
             The result is long encoded. Use [TO_STRING](#esql-to_string) to convert the result to a string,
-            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape.md) to calculate
+            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape) to calculate
             the `geo_shape` bounding geometry.
 
             These functions are related to the [`geo_grid` query](/reference/query-languages/query-dsl/query-dsl-geo-grid-query.md)

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/spatial/StGeohex.java

@@ -119,7 +119,7 @@ private static int checkPrecisionRange(int precision) {
         description = """
             Calculates the `geohex`, the H3 cell-id, of the supplied geo_point at the specified precision.
             The result is long encoded. Use [TO_STRING](#esql-to_string) to convert the result to a string,
-            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape.md) to calculate
+            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape) to calculate
             the `geo_shape` bounding geometry.
 
             These functions are related to the [`geo_grid` query](/reference/query-languages/query-dsl/query-dsl-geo-grid-query.md)

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/spatial/StGeotile.java

@@ -115,7 +115,7 @@ public GeoTileBoundedGrid get(DriverContext context) {
         description = """
             Calculates the `geotile` of the supplied geo_point at the specified precision.
             The result is long encoded. Use [TO_STRING](#esql-to_string) to convert the result to a string,
-            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape.md) to calculate
+            [TO_LONG](#esql-to_long) to convert it to a `long`, or [TO_GEOSHAPE](esql-to_geoshape) to calculate
             the `geo_shape` bounding geometry.
 
             These functions are related to the [`geo_grid` query](/reference/query-languages/query-dsl/query-dsl-geo-grid-query.md)