docs(v2): bump examples to 2af4f55 for the manual-trigger examples

Pointer-only bump of unionai-examples, bringing in
unionai-examples#311 (manual.py, programmatic.py). Prerequisite for
#1578.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QHPiCa8Yx7b3jNNxv9zEd6

Author: kumare3