fixed version for project/unproject RFC (#3021)

dev-docs/RFCs/README.md

@@ -64,7 +64,7 @@ RFCs loosely targeted for 7.x releases. Also see [luma.gl RFCs](https://github.c
 | --- | ---    | ---    | ---         |
 | [**Imperative API Improvements**](v7.x/imperative-api-rfc.md) | @ibgreen | **draft** | Potential API improvements for imperative programming. |
 | [**Partial Updates**](vNext/partial-updates-rfc.md) | @ibgreen @georgios-uber | **draft** | Allow partial updates of vertex attributes to support high-performance editing. |
-| [**Project / Unproject Improvements**](v6.x/project-unproject-rfc.md) | @ibgreen | **Draft** | Consolidating, generalizing and simplifying JS `project`/`unproject` API, covering uses from new features such as MultiView. |
+| [**Project / Unproject Improvements**](v7.x/project-unproject-rfc.md) | @ibgreen | **Draft** | Consolidating, generalizing and simplifying JS `project`/`unproject` API, covering uses from new features such as MultiView. |
 | [**Layer Operations**](v7.x/layer-and-group-operation-rfc.md) | @ibgreen| **Preliminary Approval** | Allow partial updates of vertex attributes to support high-performance editing. |
 | [**Property Animation**](v7.x/property-animation-rfc.md) | @ibgreen | Draft | Allow Layer props and GL parameters to accept functions in addition to values and call these on every render to update values |