build(docs-infra): upgrade @angular/cli to 6.2.3 (#26145)

PR Close #26145

aio/package.json

@@ -92,8 +92,8 @@
     "zone.js": "^0.8.26"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "0.6.7",
-    "@angular/cli": "^6.1.0-rc.3",
+    "@angular-devkit/build-angular": "^0.8.3",
+    "@angular/cli": "^6.2.3",
     "@angular/compiler": "^7.0.0-beta.7",
     "@angular/compiler-cli": "^7.0.0-beta.7",
     "@angular/language-service": "^7.0.0-beta.7",

aio/scripts/_payload-limits.json

@@ -2,9 +2,9 @@
   "aio": {
     "master": {
       "uncompressed": {
-        "runtime": 2768,
-        "main": 486182,
-        "polyfills": 53922,
+        "runtime": 3173,
+        "main": 483686,
+        "polyfills": 53920,
         "prettify": 14913
       }
     }