Add Emeritus TOC members

Signed-off-by: Chris Aniszczyk <[email protected]>

EMERITUS.md

@@ -14,5 +14,8 @@ We would like to acknowledge previous TOC members and their huge contributions t
 * Brian Grant (1/29/2016 - 3/17/2020)
 * Jeff Brewer (1/29/2019 - 9/1/2020)
 * Katie Gamanji (2/4/2020 - 11/2/2020)
+* Brendan Burns (1/29/2019 - 1/29/2021)
+* Matt Klein (1/29/2019 - 1/29/2021)
+* Xiang Li (1/29/2019 - 1/29/2021)
 
 We thank these members for their service to the CNCF community.