Adding missing redirect for 0.9 release notes

Author: jeff-allen-mongo

config/redirects

@@ -14,6 +14,7 @@ raw: charts/master/administration/configure-ssl-data-sources/ -> ${base}/master
 raw: charts/master/administration/start-stop-charts/ -> ${base}/master
 raw: charts/master/installation/ -> ${base}/master/launch-charts
 raw: charts/master/user-management/ -> ${base}/master
+raw: charts/v0.9/release-notes/ -> ${base}/v0.9
 [v0.9-v0.10]: charts/${version}/manage-dashboards -> ${base}/${version}/dashboards
 [v0.9-v0.10]: charts/${version}/customize-charts -> ${base}/${version}/build-charts
 [v0.9-v0.10]: charts/${version}/customize-charts/general-customization/ -> ${base}/${version}/build-charts