Fix test description typo

Co-authored-by: Marcy Sutton-Todd <[email protected]>

packages/wonder-blocks-form/src/components/__tests__/text-area.test.tsx

@@ -1546,7 +1546,7 @@ describe("TextArea", () => {
                     expect(field).toHaveAttribute("aria-invalid", "false");
                 });
 
-                it("should call onValidate with an null when the user changes the value after there was an error", async () => {
+                it("should call onValidate with null when the user changes the value after there was an error", async () => {
                     // Arrange
                     const handleValidate = jest.fn();
                     const errorMsg = "error message";