Update sdk-core to incorporate 1.60.0 api release

[jmaeagle99]

What was changed

Update sdk-core submodule to incorporate 1.60.0 api release

Why?

Bring in new protos that are needed for new features

Checklist

1. How was this tested: Unit tests
2. Any docs updates needed? No

Todo

• Update submodule after Update api_upstream to v1.60.0 sdk-core#1090 is completed

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[jmaeagle99]

Revert after temporalio/sdk-core#1090 is completed