authors: add khoa.nguyen@cockroachlabs.com to authors

Epic: None
Release Note: None

Author: khoa-nguyen-crl

AUTHORS

@@ -304,6 +304,7 @@ Kevin Chen <kchen@cockroachlabs.com>
 Kevin Guan <keynovo@gmail.com>
 Kevin Kokomani <k.koko161@gmail.com> <kokomani@cockroachlabs.com>
 Kevin Zheng <me@kzh.dev> <kevin.zheng@cockroachlabs.com>
+Khoa Nguyen <khoa.nguyen@cockroachlabs.com>
 kiran <crackerplace@gmail.com>
 Kristy Gao <kristyg@cockroachlabs.com> gaoxk <gaoxuekristy@gmail.com>
 Kyle Li <kyle.li@cockroachlabs.com> <kcao2003@gmail.com>