Add Prashant Tiwari to triage team

[dcmcand]

Prashant (@pt247 ) has made some helpful contributions to Nebari and will be working on Nebari within Quansight.. I nominate him to join the Nebari Triage team to support his upcoming contributions. :)

Pinging @nebari-dev/core-team - to share any thoughts and add Prashant if folks agree.