Bump ModelingToolkitStandardLibrary to v2.29.5 for release (#493)

Releases the rotational mechanics initialization/torque balance fix from #486, currently unreleased on master.



Claude-Session: https://claude.ai/code/session_01SFmcAmLrGPrGtzwP333mX8

Co-authored-by: ChrisRackauckas-Claude <accounts@chrisrackauckas.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: 3 people

Project.toml

@@ -1,6 +1,6 @@
 name = "ModelingToolkitStandardLibrary"
 uuid = "16a59e39-deab-5bd0-87e4-056b12336739"
-version = "2.29.4"
+version = "2.29.5"
 authors = ["Chris Rackauckas and Julia Computing"]
 
 [deps]