fix(FormSelect): updated classname for toggle icon

[thatblindgeye]

What: Related to patternfly/patternfly#5604
Closes #9170

Code to test

import React from 'react';
import { FormSelect, Select, SelectOption, SelectList, MenuToggle, MenuToggleElement, Checkbox } from '@patternfly/react-core';

export const SelectBasic: React.FunctionComponent = () => {
  const toggle = (toggleRef: React.Ref<MenuToggleElement>) => (
    <MenuToggle
      isFullWidth
    >
      Select toggle
    </MenuToggle>
  );

  return (
    <React.Fragment>
      <Select
        toggle={toggle}
        shouldFocusToggleOnSelect
      >
        <SelectList>
          <SelectOption itemId="Option 1">Option 1</SelectOption>
          <SelectOption itemId="Option 2">Option 2</SelectOption>
          <SelectOption itemId="Option 3">Option 3</SelectOption>
        </SelectList>
      </Select>
      <FormSelect value="Form select toggle" aria-label="FormSelect Input" ouiaId="BasicFormSelect">

        <FormSelectOption value="Form select toggle" label="Form select toggle" />

    </FormSelect>
    </React.Fragment>
  );
};

Additional issues:

[patternfly-build]

Preview: https://patternfly-react-pr-9168.surge.sh

A11y report: https://patternfly-react-pr-9168-a11y.surge.sh

[mcoker]

L🎃TM

[patternfly-build]

Your changes have been released in:

• @patternfly/react-code-editor@5.0.0-alpha.121
• @patternfly/react-core@5.0.0-alpha.120
• @patternfly/react-docs@6.0.0-alpha.129
• demo-app-ts@5.0.0-alpha.104
• @patternfly/react-table@5.0.0-alpha.123

Thanks for your contribution! 🎉