Revert "Bump core-js to v3.45"

This reverts commit fe916c5.

Author: tvdijen

package.json

@@ -26,6 +26,7 @@
     "@babel/preset-env": "^7.28.3",
     "babel-loader": "^10.0.0",
     "copy-webpack-plugin": "^13.0.1",
+    "core-js": "^2.6.12",
     "core-js": "^3.46.0",
     "css-loader": "^7.1.2",
     "expose-loader": "^5.0.1",