update alumni (#7545)

Author: Borda

docs/source/governance.rst

@@ -1,7 +1,7 @@
 .. _governance:
 
-PyTorch Lightning Governance | Persons of interest
-==================================================
+Lightning Governance | Persons of interest
+==========================================
 
 Leads
 -----
@@ -18,7 +18,6 @@ Leads
 Core Maintainers
 ----------------
 - Nicki Skafte (`skaftenicki <https://github.com/SkafteNicki>`_)
-- Peter Yu (`yukw777 <https://github.com/yukw777>`_)
 - Rohit Gupta (`rohitgr7 <https://github.com/rohitgr7>`_)
 - Jeff Yang (`ydcjeff <https://github.com/ydcjeff>`_)
 - Roger Shieh (`s-rog <https://github.com/s-rog>`_)
@@ -38,3 +37,4 @@ Alumni
 - Jeff Ling (`jeffling <https://github.com/jeffling>`_)
 - Teddy Koker (`teddykoker <https://github.com/teddykoker>`_)
 - Nate Raw (`nateraw <https://github.com/nateraw>`_)
+- Peter Yu (`yukw777 <https://github.com/yukw777>`_)