Update version to 2.1.2

[sakimsft]

Description and Motivation

Update version to 2.1.2

Change type

• [ ] Bug fix
• [x] New feature
• [ ] Enhancement
• [ ] Breaking change (breaks backward compatibility)

Checklist:

• [x] All tests passed
• [x] The code follows the code style and conventions of this project
• [ ] The change requires a change to the documentation
• [ ] I have updated the documentation accordingly

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This change is 

[dluc]

please clarify what the version is about, I assume RM?

[sakimsft]

@dluc Yes, it is RM