Update simbody to include C++20 fixes (#3619)

[adamkewley]

Fixes issue #3619

Brief summary of changes

• Updates simbody to include this PR's changes
• Issue that explains why it's necessary under C++20: Cannot compile in C++20 if a compilation unit uses MultibodyGraphMaker.h simbody/simbody#766

Testing I've completed

• I have been using this patch to build OpenSim Creator with C++20 features for the last few weeks with no issues

Looking for feedback on...

CHANGELOG.md (choose one)

• updated.

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This change is 

[adamkewley]

Merging this fairly rapidly because the upstream changeset (in simbody) is small, but it means that C++20 builds can be made from opensim-core/main, rather than custom branches, etc.

[adamkewley]

Thanks for checking @tkuchida !

[aymanhab]

Thanks @adamkewley and @tkuchida 👍