[horde] php-extended/polyfill-php80-stringable Use php >= 8.0 instead

[Admin Beckspaced]

Dear Horde Users,

could someone perhaps share some insights on how to fix this warning notice:

_/Package php-extended/polyfill-php80-stringable is abandoned, you 
should avoid using it. Use php >= 8.0 instead.
No security vulnerability advisories found./_

the horde install was done via composer.
I will copy the compser.json below

I already tried adding

     "require": {
         "php": ">=8.0",
         "composer-plugin-api": "^2.0",
         "horde/horde-installer-plugin": "^2.5.1 || dev-FRAMEWORK_6_0 || 
dev-master",
         ....

and doing a 'composer update'
but this did not change a thing.

What's the proper procedure to get this fixed?

thanks
& with best regards
Becki



==========

{
     "name": "horde/bundle",
     "description": "A base project for a horde installation",
     "type": "project",
     "repositories": {
         "0": {
             "url": "https://horde-satis.maintaina.com",
             "type": "composer"
         }
     },
     "require": {
         "composer-plugin-api": "^2.0",
         "horde/horde-installer-plugin": "^2.5.1 || dev-FRAMEWORK_6_0 || 
dev-master",
         "horde/horde": "^6 || dev-FRAMEWORK_6_0",
         "horde/routes": "^3 || dev-FRAMEWORK_6_0",
         "horde/hordectl": "^1 || dev-FRAMEWORK_6_0 || dev-master",
         "pear/console_color2": "^0.1.2",
         "pear/console_table": "^1.3",
         "horde/imp": "dev-FRAMEWORK_6_0",
         "horde/passwd": "dev-FRAMEWORK_6_0",
         "horde/turba": "dev-FRAMEWORK_6_0"
     },
     "require-dev": {
         "horde/test": "^3 || dev-FRAMEWORK_6_0 || dev-master"
     },
     "license": "GPL-3.0-only",
     "authors": [
         {
             "name": "Ralf Lang",
             "email": "lang at b1-systems.de"
         }
     ],
     "minimum-stability": "dev",
     "prefer-stable": true,
     "extra": {
         "installer-types": [
             "horde-library",
             "horde-application"
         ]
     },
     "config": {
         "allow-plugins": {
             "horde/horde-installer-plugin": true
         }
     }
}


==========