Add ForwardLoggingPlugin and ForwardOutput to built-in worker plugins documentation

[moi90]

ForwardLoggingPlugin and ForwardOutput were missing from the "Built-In Worker Plugins" section. This PR adds them.

• [ ] Tests added / passed
• [x] Passes pre-commit run --all-files

[github-actions[bot]]

Unit Test Results

See test report for an extended history of previous test failures. This is useful for diagnosing flaky tests.

    27 files  ±0      27 suites  ±0   9h 45m 4s ⏱️ - 2m 51s  4 112 tests ±0   4 005 ✅ +1    104 💤 ±0  3 ❌  - 1  51 516 runs  ±0  49 329 ✅ +1  2 184 💤 ±0  3 ❌  - 1 

For more details on these failures, see this check.

Results for commit 9b42f022. ± Comparison against base commit ac04bfa3.

[moi90]

The failing tests should be unrelated.