Update dependency simple-icons/simple-icons to v15

Author: renovate[bot]

composer.json

@@ -2,7 +2,7 @@
     "require": {
         "fortawesome/font-awesome": "6.7.2",
         "loganmarchione/homelab-svg-assets": "0.4.11",
-        "simple-icons/simple-icons": "14.13.0",
+        "simple-icons/simple-icons": "15.0.0",
         "twbs/bootstrap": "v5.3.6",
         "twbs/bootstrap-icons": "1.13.1",
         "twig/twig": "3.21.1"