Typo in the pip installation instructions package name for azure-digitaltwins-core

[joseba-altran]

• Package Name: azure-digitaltwins-core
• Package Version: master
• Operating System: N/A
• Python Version: N/A

Describe the bug
README.md includes a small typo in the package name:

pip install azure-digitaltiwns-core azure-identity

Expected behavior
The snippet should read:

pip install azure-digitaltwins-core azure-identity

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @sourabhguha, @inesk-vt.