Release notes for Grafana 9.1.1

Cloud Monitoring: Support SLO burn rate. #53710, @itkq
Schema: Restore “hidden” in LegendDisplayMode. #53925, @academo
Timeseries: Revert the timezone(s) property name change back to singular. #53926, @academo

Alerting: Fix links in Microsoft Teams notifications. #54003, @grobinson-grafana
Alerting: Fix notifications for Microsoft Teams. #53810, @grobinson-grafana
Alerting: Fix width of Adaptive Cards in Teams notifications. #53996, @grobinson-grafana
ColorPickerInput: Fix popover in disabled state. #54000, @Clarity-89
Decimals: Fixes auto decimals to behave the same for positive and negative values. #53960, @JoaoSilvaGrafana
Loki: Fix unique log row id generation. #53932, @gabor
Plugins: Fix file extension in development authentication guide. #53838, @pbzona
TimeSeries: Fix jumping legend issue. #53671, @zoltanbedi
TimeSeries: Fix memory leak on viz re-init caused by KeyboardPlugin. #53872, @leeoniya

TimePicker: Fixes relative timerange of less than a day not displaying. #53975, @JoaoSilvaGrafana
GrafanaUI: Fixes ClipboardButton to always keep multi line content. #53903, @JoaoSilvaGrafana