docs(@angular-devkit/build-angular): update vendorChunk and commonChunk descriptions

(cherry picked from commit 64aa570)

Author: alan-agius4

packages/angular_devkit/build_angular/src/browser/schema.json

@@ -182,12 +182,12 @@
     },
     "vendorChunk": {
       "type": "boolean",
-      "description": "Use a separate bundle containing only vendor libraries.",
+      "description": "Generate a seperate bundle containing only vendor libraries. This option should only used for development.",
       "default": true
     },
     "commonChunk": {
       "type": "boolean",
-      "description": "Use a separate bundle containing code used across multiple bundles.",
+      "description": "Generate a seperate bundle containing code used across multiple bundles.",
       "default": true
     },
     "baseHref": {

packages/angular_devkit/build_angular/src/dev-server/schema.json

@@ -173,12 +173,12 @@
     },
     "vendorChunk": {
       "type": "boolean",
-      "description": "Use a separate bundle containing only vendor libraries.",
+      "description": "Generate a seperate bundle containing only vendor libraries. This option should only used for development.",
       "x-deprecated": "Use the \"vendorChunk\" option in the browser builder instead."
     },
     "commonChunk": {
       "type": "boolean",
-      "description": "Use a separate bundle containing code used across multiple bundles.",
+      "description": "Generate a seperate bundle containing code used across multiple bundles.",
       "x-deprecated": "Use the \"commonChunk\" option in the browser builder instead."
     },
     "baseHref": {