2.7.2rc9: Bug fixes and document updates

What's Changed

• [2.7] Update links on web page by @nvkevlu in #4160
• [2.7] Restructure documentation for persona-driven navigation and real-world use cases [skip ci] by @chesterxgchen in #4159
• [2.7] Add retry mechanism for streaming download on TIMEOUT by @chesterxgchen in #4167
• [2.7] Fix stream pool starvation issue by @YuanTingHsieh in #4171

Full Changelog: 2.7.2rc8...2.7.2rc9