docs: fix descriptions

Author: kgryte

lib/node_modules/@stdlib/utils/async/count-by/docs/types/index.d.ts

@@ -109,15 +109,15 @@ type BinaryNext = ( error: Error | null, group: string | Symbol | number ) => vo
 type Next = NullaryNext | UnaryNext | BinaryNext;
 
 /**
-* Checks whether an element in a collection passes a test.
+* Returns the group to which a collection element belongs.
 *
 * @param value - collection value
 * @param next - a callback to be invoked after processing a collection `value`
 */
 type BinaryIndicator<T, V> = ( this: V, value: T, next: Next ) => void;
 
 /**
-* Checks whether an element in a collection passes a test.
+* Returns the group to which a collection element belongs.
 *
 * @param value - collection value
 * @param index - collection index
@@ -126,7 +126,7 @@ type BinaryIndicator<T, V> = ( this: V, value: T, next: Next ) => void;
 type TernaryIndicator<T, V> = ( this: V, value: T, index: number, next: Next ) => void;
 
 /**
-* Checks whether an element in a collection passes a test.
+* Returns the group to which a collection element belongs.
 *
 * @param value - collection value
 * @param index - collection index
@@ -136,7 +136,7 @@ type TernaryIndicator<T, V> = ( this: V, value: T, index: number, next: Next ) =
 type QuaternaryIndicator<T, V> = ( this: V, value: T, index: number, collection: Collection<T>, next: Next ) => void;
 
 /**
-* Checks whether an element in a collection passes a test.
+* Returns the group to which a collection element belongs.
 *
 * @param value - collection value
 * @param index - collection index