fix(doc): fix typo in st_covers doc_example (#42)

Change-Id: I5ed81fd65f1e28ddf50b568672d09dd170b17504

Author: ddupg

rust/geodatafusion/src/udf/geo/relationships/topological/relate.rs

@@ -135,7 +135,7 @@ impl_relate_udf!(
     COVERS_DOC,
     |matrix| matrix.is_covers(),
     "Returns true if every point in Geometry/Geography B lies inside (i.e. intersects the interior or boundary of) Geometry/Geography A. Equivalently, tests that no point of B lies outside (in the exterior of) A.",
-    "ST_CoveredBy(geomA, geomB)"
+    "ST_Covers(geomA, geomB)"
 );
 impl_relate_udf!(
     Touches,