add missing redirect (#36)

Author: jwilliams-mongo

config/redirects

@@ -17,6 +17,7 @@ raw: docs/atlas/reference/atlas-operator/atlascluster-custom-resource/ -> ${base
 # new redirects to account for newly versioned doc set
 
 raw: docs/atlas/atlas-operator/ -> ${base}/stable/
+[*]: ${old_bucket_prefix}/${version}/ -> ${base}/stable/
 raw: docs/atlas/reference/atlas-operator/ak8so-back-up-deployment/ -> ${base}/stable/ak8so-back-up-deployment/
 raw: docs/atlas/reference/atlas-operator/ak8so-alert-configurations/ -> ${base}/stable/ak8so-alert-configurations/
 raw: docs/atlas/reference/atlas-operator/ak8so-changelog/ -> ${base}/stable/ak8so-changelog/