docs: fix err description

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---

Author: headlessNode

lib/node_modules/@stdlib/blas/ext/index-of/lib/assign.js

@@ -53,9 +53,7 @@ var DEFAULT_DTYPE = defaults.get( 'dtypes.integer_index' );
 * @param {ndarrayLike} out - output ndarray
 * @param {Options} [options] - function options
 * @param {IntegerArray} [options.dims] - list of dimensions over which to perform operation
-* @param {boolean} [options.keepdims=false] - boolean indicating whether the reduced dimensions should be included in the returned ndarray as singleton dimensions
-* @param {string} [options.dtype] - output ndarray data type
-* @throws {TypeError} function must be provided at least two arguments
+* @throws {TypeError} function must be provided at least three arguments
 * @throws {TypeError} first argument must be an ndarray-like object
 * @throws {TypeError} third argument must be either an ndarray-like object or an integer
 * @throws {TypeError} fourth argument must be an ndarray-like object