Add apurvans as SQL code owner (Azure#13582)

Author: bcham

CODEOWNERS

@@ -67,7 +67,7 @@
 /specification/service-map/ @daveirwin1
 /specification/servicebus/ @sazeesha @v-ajnava
 /specification/servicefabric/ @juhacket @samedder
-/specification/sql/ @jamestao @bcham
+/specification/sql/ @jamestao @bcham @apurvans
 /specification/storage/ @blueww @jasonyang-msft @xiaonlimsft
 /specification/storage/data-plane/ @kasobol-msft @seanmcc-msft
 /specification/storageimportexport/ @leoz-ms