Update CODEOWNERS (#1730)

Co-authored-by: LocalStack Bot <[email protected]>

Author: localstack-bot

CODEOWNERS

@@ -171,7 +171,7 @@
 /content/en/user-guide/aws/ram/ @viren-nadkarni
 
 # rds
-/content/en/user-guide/aws/rds/ @bentsku @cloutierMat @steffyP
+/content/en/user-guide/aws/rds/ @cloutierMat @nik-localstack @steffyP @bentsku
 
 # route53
 /content/en/user-guide/aws/route53/ @giograno