fix(deps): update dependency @reduxjs/toolkit to v2

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "@openedx/frontend-slot-footer": "^1.0.2",
     "@openedx/paragon": "^22.16.0",
     "@popperjs/core": "2.11.8",
-    "@reduxjs/toolkit": "1.9.7",
+    "@reduxjs/toolkit": "2.6.1",
     "buffer": "^6.0.3",
     "classnames": "2.5.1",
     "copy-webpack-plugin": "^12.0.0",