[AE-13] Arduino Agent -> Arduino Create Agent

[aliphys]

What This PR Changes

• Change Arduino Agent to Arduino Create Agent in the Getting Started tutorial (cc @Jorgetrujilloroman )

Contribution Guidelines

• I confirm that I have read the contribution guidelines and comply with them.

[aliphys]

@jhansson-ard There are spell check issues with files not covered in this PR. What steps should we take?

e.g

• https://github.com/arduino/docs-content/blob/main/content/tutorials/projects/localize-your-board-with-an-sms/localize-your-board-with-an-sms.md
• https://github.com/arduino/docs-content/blob/main/content/tutorials/projects/lorawan-farming-with-mkr-wan-1310/lorawan-farming-with-mkr-wan-1310.md

[gatsby-cloud]

✅ docs-content deploy preview ready

• Deploy preview
• Build logs · 17m build time

[jhansson-ard]

@aliphys to merge this PR, we need to update the spelling issues - even though they are not related to this file 🙏🏼