upgraded angular version from 10 to 11

Author: islambek01

angular.json

@@ -41,7 +41,6 @@
               "optimization": true,
               "outputHashing": "all",
               "sourceMap": false,
-              "extractCss": true,
               "namedChunks": false,
               "extractLicenses": true,
               "vendorChunk": false,