Update README.md - greetings

[VeigaPunk]

• I have read CONTRIBUTING.md.
• I have created a discussion that was approved by a maintainer (for new features).

[charmcli]

Thank you for your submission. We really appreciate it! Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request comment same as the below format.

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I have read the Contributor License Agreement (CLA) and hereby sign the CLA.

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_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}