Docs: Add versioning section to README

Signed-off-by: Aravindhan Ayyanathan <aravindhan.a@est.tech>

Author: aravindtga

README.md

@@ -12,6 +12,10 @@ project as of December 2023.
 
 Documentation of Porch is available in the [Porch documentation page](https://porch.kpt.dev/).
 
+## Versioning
+
+This project follows the [kpt project versioning guidelines](https://github.com/kptdev/governance/blob/main/VERSIONING.md).
+
 ## License compliance
 
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.qkg1.top%2Fkptdev%2Fporch.svg?type=large&issueType=license)](https://app.fossa.com/projects/git%2Bgithub.qkg1.top%2Fkptdev%2Fporch?ref=badge_large&issueType=license)