[c-nsp] Swapping A9K-RSP's different versions

[Mati Panos]

Hi Everyone

Hope everyone is keeping well!

We need to increase the memory on our A9K routers.  They are currently
running a pair of A9K-RSP440-TR (6Gb).  Is it possible to replace the
standby with a A9K-RSP440-SE(12Gb) and seamlessley switchover to the
standby so it becomes the active RSP?  Any recommendations on how best to
do to this without downtime?  They will use the same IOS-XR version

Many Thanks