[FEAT] Remove Magento v2.3 from supported-versions

[damienwebdev]

💡 Feature request

Feature Name

v2.3 End-of-life

The Desired Behavior

Magento v2.3 is no longer a supported version. As a result, we should drop it from https://github.com/graycoreio/github-actions-magento2/blob/main/supported-version/src/kind/currently-supported.json

Prior Work

https://experienceleague.adobe.com/docs/commerce-operations/release/planning/lifecycle-policy.html