[VOTE][RESULT] Release Apache Spark K8s Operator 0.5.0 (RC1)

[Dongjoon Hyun]

The vote passes with 7 +1s (4 binding +1s).
Thanks to all who helped with the release!

(* = binding)
+1:
- Dongjoon Hyun *
- Yang Jie *
- Zhou Jiang
- Augusto Vivaldelli
- Liang-Chi Hsieh *
- Huaxin Gao *
- Peter Toth

+0: None

-1: None