add redirect for old compat reference page (#992)

Author: jordan-smith721

config/redirects

@@ -244,7 +244,7 @@ raw: docs/drivers/drivers/scala/ -> ${base}/scala/
 raw: docs/drivers/drivers/swift/ -> ${base}/swift/
 
 raw: docs/drivers/drivers/driver-compatibility-reference -> ${base}/
-
+raw: docs/drivers/driver-compatibility-reference/ -> ${base}/about-compatibility/
 
 # Redirect for outdated Community Drivers page