docs(@angular/build): correct outputFile and port option descriptions

The unit-test `outputFile` description stated that the path applies only to the first
reporter, but it is passed to Vitest as is and used by every configured reporter that
writes to a file. The dev-server `port` description did not mention that the `PORT`
environment variable takes precedence over the option.

Author: MeAkib

packages/angular/build/src/builders/dev-server/schema.json

@@ -11,7 +11,7 @@
     },
     "port": {
       "type": "number",
-      "description": "Port to listen on.",
+      "description": "Port to listen on. The `PORT` environment variable, when set, takes precedence over this option.",
       "default": 4200
     },
     "host": {

packages/angular/build/src/builders/unit-test/schema.json

@@ -258,7 +258,7 @@
     },
     "outputFile": {
       "type": "string",
-      "description": "Specifies a file path for the test report, applying only to the first reporter. To configure output files for multiple reporters, use the tuple format `['reporter-name', { outputFile: '...' }]` within the `reporters` option. When not provided, output is written to the console."
+      "description": "Specifies a file path for the test report. This path is used by every configured reporter that writes to a file. To write a separate file for each reporter, use the tuple format `['reporter-name', { outputFile: '...' }]` within the `reporters` option. When not provided, output is written to the console."
     },
     "providersFile": {
       "type": "string",