chore: bump bamboo submodule pointer

[bigduu]

Summary

• advance the Bamboo submodule to the merge of Bamboo PR #850
• bring the HTTP/1.1-only inbound transport and patched h2 dependency graph from Bamboo Issue #849 into Zenith

Submodule Updates

Submodule	Old SHA	New SHA	Rationale
bamboo	f3b84b109e97099497bc397a45f6b2609eaa487b	164ffd9c32bca7a056f23b901c19f03f8d90158e	Advance to the merged Bamboo #849 transport security fix from PR #850.

Verification

• confirmed the new Bamboo SHA is the merge commit for PR #850 and the current Bamboo dev head
• confirmed the old SHA is an ancestor of the new SHA (0 behind, 2 ahead)
• confirmed the root diff contains only the bamboo mode-160000 gitlink
• git diff --cached --check passed before commit