undici is used in @actions/github, but it isn't in dependencies:

• toolkit/packages/github/src/internal/utils.ts

  Line 4 in ef77c9d

  import {ProxyAgent, fetch} from 'undici'

• toolkit/packages/github/package.json

  Lines 40 to 48 in ef77c9d

  	"dependencies": {
  	"@actions/http-client": "^2.2.0",
  	"@octokit/core": "^5.0.1",
  	"@octokit/plugin-paginate-rest": "^9.0.0",
  	"@octokit/plugin-rest-endpoint-methods": "^10.0.0"
  	},
  	"devDependencies": {
  	"proxy": "^2.1.1"
  	}