chore(docs): fix documentation url

[leotm]

fix link to home page, consistent with

playwright/README.md

Line 5 in 2d150ee

## [Documentation](https://playwright.dev) | [API reference](https://playwright.dev/docs/api/class-playwright)

instead of linking to: Docs > Getting Started > Installation

[github-actions]

Test results for "tests 1"

6 flaky

⚠️ [installation tests] › playwright-electron-should-work.spec.ts:44:5 › should work when wrapped inside @playwright/test and trace is enabled @package-installations-macos-latest @playwright/test
⚠️ [playwright-test] › ui-mode-test-setup.spec.ts:22:5 › should run global setup and teardown @ubuntu-latest-node20-1
⚠️ [webkit-library] › library/browsercontext-clearcookies.spec.ts:72:3 › should remove cookies by name regex @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › library/browsercontext-clearcookies.spec.ts:92:3 › should remove cookies by domain @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › library/browsercontext-viewport-mobile.spec.ts:116:5 › mobile viewport › default mobile viewports to 980 width @webkit-ubuntu-22.04-node18
⚠️ [webkit-library] › library/screenshot.spec.ts:75:14 › page screenshot › should work with device scale factor @webkit-ubuntu-22.04-node18

35989 passed, 624 skipped
✔️✔️✔️

Merge workflow run.

[dgozman]

Thank you for the PR, looks good.