Update Stadia (#4503)

Co-authored by: @fbernhart

_data/simple-icons.json

@@ -6383,7 +6383,7 @@
         {
             "title": "Stadia",
             "hex": "CD2640",
-            "source": "https://stadia.dev"
+            "source": "https://stadia.google.com/home"
         },
         {
             "title": "Staffbase",

icons/stadia.svg

@@ -1 +1 @@
-<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Stadia icon</title><path d="M.202 8.668a.482.482 0 0 0-.202.39v.006c0 .064.014.128.04.19l2.298 5.204c.102.23.364.343.602.259 1.504-.536 6.713-2.233 10.083-1.318 0 0-3.381.196-6.438 2.593a.48.48 0 0 0-.142.571l1.029 2.326.396.929c.094.22.395.247.528.047.713-1.074 1.916-1.611 3.072-2.08a17.647 17.647 0 0 1 3.679-1.05 15.993 15.993 0 0 1 4.07-.167.481.481 0 0 0 .503-.335l1.038-3.317a.48.48 0 0 0-.176-.531c-1.158-.838-5.741-3.654-13.802-2.523 0 0 6.878-3.951 15.61.39a.481.481 0 0 0 .673-.288l.915-2.925A.484.484 0 0 0 24 6.902v-.014a.48.48 0 0 0-.243-.41C22.66 5.858 18.95 4 13.846 4 9.934 4 5.203 5.09.202 8.668"/></svg>
+<svg role="img" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><title>Stadia icon</title><path d="M6.5253 10.0302a18.279 18.279 0 0 1 15.7805.263c.263.1973.6575 0 .7233-.263l.9205-2.8273c.1315-.263 0-.6576-.3288-.789A22.3557 22.3557 0 0 0 .2788 8.6493a.6575.6575 0 0 0-.1972.8548l2.1698 4.7999c.1315.3287.526.526.8548.3945 2.4328-.9205 6.1807-1.841 9.9943-1.315-2.63.4602-4.6684 1.3807-6.3122 2.367a.6575.6575 0 0 0-.1972.8548L7.906 19.63c.1315.263.4603.3288.6575.1315.526-.526 1.052-.9205 1.5123-1.1835 2.104-1.1836 4.9972-2.1041 8.8765-1.9068a.6575.6575 0 0 0 .6576-.4603l.9862-2.9589c.1316-.263 0-.6575-.263-.789a20.0544 20.0544 0 0 0-13.8737-2.4328z"/></svg>