docs: correct return-condition wording in blas/ext/base/zindex-of-column

Replace `unable to find a search vector` with `unable to find a matching
column` in the JSDoc and TypeScript declarations to match the README and
the wording used by the analogous `dindex-of-column` package.

Author: claude

lib/node_modules/@stdlib/blas/ext/base/zindex-of-column/docs/types/index.d.ts

@@ -32,7 +32,7 @@ interface Routine {
 	*
 	* ## Notes
 	*
-	* -   If the function is provided an empty matrix or if the function is unable to find a search vector, the function returns `-1` (i.e., an invalid index).
+	* -   If the function is provided an empty matrix or if the function is unable to find a matching column, the function returns `-1` (i.e., an invalid index).
 	* -   The `workspace` array is only applicable when an input matrix is stored in row-major order. When the matrix is stored in column-major order, the workspace array is ignored.
 	*
 	* @param order - storage layout
@@ -64,7 +64,7 @@ interface Routine {
 	*
 	* ## Notes
 	*
-	* -   If the function is provided an empty matrix or if the function is unable to find a search vector, the function returns `-1` (i.e., an invalid index).
+	* -   If the function is provided an empty matrix or if the function is unable to find a matching column, the function returns `-1` (i.e., an invalid index).
 	* -   The `workspace` array is only applicable when an input matrix is stored in row-major order. When the matrix is stored in column-major order, the workspace array is ignored.
 	*
 	* @param M - number of rows in `A`
@@ -100,7 +100,7 @@ interface Routine {
 *
 * ## Notes
 *
-* -   If the function is provided an empty matrix or if the function is unable to find a search vector, the function returns `-1` (i.e., an invalid index).
+* -   If the function is provided an empty matrix or if the function is unable to find a matching column, the function returns `-1` (i.e., an invalid index).
 * -   The `workspace` array is only applicable when an input matrix is stored in row-major order. When the matrix is stored in column-major order, the workspace array is ignored.
 *
 * @param order - storage layout

lib/node_modules/@stdlib/blas/ext/base/zindex-of-column/lib/ndarray.js

@@ -33,7 +33,7 @@ var reinterpret = require( '@stdlib/strided/base/reinterpret-complex128' );
 *
 * ## Notes
 *
-* -   If the function is provided an empty matrix or if the function is unable to find a search vector, the function returns `-1` (i.e., an invalid index).
+* -   If the function is provided an empty matrix or if the function is unable to find a matching column, the function returns `-1` (i.e., an invalid index).
 * -   The `workspace` array is only applicable when an input matrix is stored in row-major order. When the matrix is stored in column-major order, the workspace array is ignored.
 *
 * @param {PositiveInteger} M - number of rows in `A`

lib/node_modules/@stdlib/blas/ext/base/zindex-of-column/lib/zindex_of_column.js

@@ -36,7 +36,7 @@ var ndarray = require( './ndarray.js' );
 *
 * ## Notes
 *
-* -   If the function is provided an empty matrix or if the function is unable to find a search vector, the function returns `-1` (i.e., an invalid index).
+* -   If the function is provided an empty matrix or if the function is unable to find a matching column, the function returns `-1` (i.e., an invalid index).
 * -   The `workspace` array is only applicable when an input matrix is stored in row-major order. When the matrix is stored in column-major order, the workspace array is ignored.
 *
 * @param {string} order - storage layout