docs: fix typo in APIRequestContext multipart docs

[Rohan5commit]

Summary

• fix "specifiying" to "specifying" in the APIRequestContext multipart documentation

Related issue

• N/A (minor documentation update; Playwright CONTRIBUTING exempts these from the issue requirement)

Guideline alignment

• Follows CONTRIBUTING.md: single-file docs-only change with no behavior impact

Validation

• Not run (documentation-only change)

[Copilot]

Pull request overview

This PR makes a documentation-only correction in the APIRequestContext multipart request guidance, fixing a typo to improve clarity for users following the multipart upload example.

Changes:

• Corrects “specifiying” → “specifying” in the multipart/form-data description.

[yury-s]

Please run build to update generated files, then we can merge this PR.

[github-actions]

Test results for "MCP"

5507 passed, 343 skipped

---

Merge workflow run.

[github-actions]

Test results for "tests 1"

4 flaky

⚠️ [chromium-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@chromium-ubuntu-22.04-node24`
⚠️ [chromium-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@chromium-ubuntu-22.04-node20`
⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1080 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node20`
⚠️ [webkit-library] › library/trace-viewer.spec.ts:1223 › should display language-specific locators `@webkit-ubuntu-22.04-node20`

38817 passed, 845 skipped

---

Merge workflow run.

[pavelfeldman]

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