fix: java style selector string

[Simon Knott (Skn0tt)]

In Java and DotNet, we don't document wrapping parantheses: https://playwright.dev/java/docs/api/class-selectors#selectors-register

Without them, we throw an error though since 3371fb9:

Error: page.textContent: SyntaxError: Unexpected token '{'
        at eval (<anonymous>)
        at InjectedScript.eval (<anonymous>:6418:24)
        at new InjectedScript (<anonymous>:6408:36)
        at <anonymous>:7741:16
        at <anonymous>:7742:11
    Call log:
      - waiting for locator('textContent=div')

        at InjectedScript.eval (<anonymous>:6418:24)
        at InjectedScript (<anonymous>:6408:36)
        at <anonymous>:7741:16
        at <anonymous>:7742:11
        at /Users/skn0tt/dev/microsoft/playwright/tests/page/selectors-register.spec.ts:143:14
        at InjectedScript.eval (<anonymous>:6418:24)
        at InjectedScript (<anonymous>:6408:36)
        at <anonymous>:7741:16
        at <anonymous>:7742:11
        at InjectedScript.eval (<anonymous>:6418:24)
        at InjectedScript (<anonymous>:6408:36)
        at <anonymous>:7741:16
        at <anonymous>:7742:11

[github-actions]

Test results for "tests 1"

3 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:986:7 › cli codegen › should not throw csp directive violation errors @firefox-ubuntu-22.04-node18
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104:3 › should work with strict CSP policy @firefox-ubuntu-22.04-node18
⚠️ [playwright-test] › ui-mode-test-watch.spec.ts:145:5 › should watch all @windows-latest-node18-1

39327 passed, 818 skipped
✔️✔️✔️

Merge workflow run.