Release notes for Grafana 8.5.1

Azure Monitor: Fix space character encoding for metrics query link to Azure Portal. #48139, @kevinwcyu
CloudWatch: Prevent log groups from being removed on query change. #47994, @asimpson
Cloudwatch: Fix template variables in variable queries. #48140, @iwysiu
Explore: Prevent direct access to explore if disabled via feature toggle. #47714, @Elfo404
InfluxDB: Fixes invalid no data alerts. #48295, @yesoreyeram
Navigation: Prevent navbar briefly showing on login. #47968, @ashharrison90
Plugins Catalog: Fix styling of hyperlinks. #48196, @marefr
Table: Fix filter crashes table. #48258, @zoltanbedi
TimeSeries: Properly stack series with missing datapoints. #48321, @leeoniya