Fix typo: Utililites -> Utilities (#6581)

Author: cknitt

jscomp/others/belt_Array.resi

@@ -13,7 +13,7 @@
 /* Adapted significantly by Authors of ReScript */
 
 /***
-Utililites for `Array` functions.
+Utilities for `Array` functions.
 
 ### Note about index syntax
 

jscomp/others/belt_Float.res

@@ -23,7 +23,7 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
 
 /*** [`Belt.Float`]()
-    Utililites for Float
+    Utilities for Float
 */
 
 @val external isNaN: float => bool = "isNaN"

jscomp/others/belt_Int.res

@@ -23,7 +23,7 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
 
 /*** [`Belt.Int`]()
-    Utililites for Int
+    Utilities for Int
 */
 
 @val external isNaN: int => bool = "isNaN"