docs: Enhance docs/src/api/class-browsercontext.md

[stefanseeger]

For me reading the doc was a bit confusing.

1. The / character implies a "or" to me not an and (but I'm no native speaker)
2. Not highlighting the property names made it harder to read
3. There was a missing "." in the path description

[dgozman]

Thank you for the PR! Unfortunately, it's not enough to just change this file. You need to run npm run build or npm run watch. See contributing guide for more details. Thank you!

[stefanseeger]

@microsoft-github-policy-service agree

[github-actions]

Test results for "tests 1"

1 failed
❌ [playwright-test] › ui-mode-test-network-tab.spec.ts:204 › should not preserve selection across test runs @windows-latest-node18-1

2 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node18`

46916 passed, 811 skipped

---

Merge workflow run.

[dgozman]

Thank you for the PR! Looking great, merging in.