Astra change "Previous" and "Next" text string in the Blog

/**
 * Next and Previous String
 *
 * @param array $strings     List of default strings used in theme
 * @return array $strings
 */
function post_default_strings_callback( $strings ) {

    // Next Post
    $strings['string-single-navigation-next']   = __('Go to the Next Post', 'astra') . ' →';

    // Previous Post
    $strings['string-single-navigation-previous']   = '← ' . __('Go to Previous Post', 'astra');

    return $strings;
}
add_filter( 'astra_default_strings', 'post_default_strings_callback', 10 );