fix(deps): update dependency @ionic/core to v8

Author: renovate[bot]

apps/ionic-demo/package.json

@@ -26,7 +26,7 @@
     "@capacitor/keyboard": "^5.0.8",
     "@capacitor/status-bar": "^5.0.7",
     "@ionic/angular": "^7.8.2",
-    "@ionic/core": "^7.8.2",
+    "@ionic/core": "^8.0.0",
     "@stencil/core": "^4.14.0",
     "@tsparticles/angular": "workspace:^",
     "@tsparticles/basic": "^3.3.0",