Workbench: `notifications.conf` does not template correctly

Reprex

values.yaml:

config:
  session:
    notifications.conf:
      - StartTime: 2023-11-20 12:00:00 -5:00
        EndTime: 2023-12-27 20:00:00 -05:00
        Message: Please remember to shut down your computers at the end of the day.

Output:

$ helm template posit-workbench rstudio/rstudio-workbench --values values.yaml | grep -C 5 notifications.conf
coalesce.go:286: warning: cannot overwrite table with non table for rstudio-workbench.config.session.notifications.conf (map[])
coalesce.go:286: warning: cannot overwrite table with non table for rstudio-workbench.config.session.notifications.conf (map[])
metadata:
  name: posit-workbench-rstudio-workbench-session
  namespace: samedwardes-posit-team
data:
  
  notifications.conf: |
    EndTime=2023-12-27 20:00:00 -05:00
    Message=Please remember to shut down your computers at the end of the day.
    StartTime=2023-11-20 12:00:00 -5:00
  
  rsession.conf: |

Expected output:

data:
  
  notifications.conf: |
    EndTime: 2023-12-27 20:00:00 -05:00
    Message: Please remember to shut down your computers at the end of the day.
    StartTime: 2023-11-20 12:00:00 -5:00

The issue is that the notifications.conf format should use : instead of =: https://docs.posit.co/ide/server-pro/rstudio_pro_sessions/notifications.html

Temporary fix

If users are running into this issue, they can pass the entire notifications.conf as a string instead of a YAML object:

config:
  session:
    notifications.conf: |
      StartTime: 2023-11-20 12:00:00 -5:00
      EndTime: 2023-12-27 20:00:00 -05:00
      Message: Please remember to shut down your computers at the end of the day.

Long term fix

We should update the templating so that when notifications.yaml gets a yaml object we use : instead of = in the output.

Reproduce the issue with the provided values.yaml and helm template, then trace the chart templating for config.session.notifications.conf. The fix is complete when an object input renders each notification field with : rather than =, matching the documented format and expected output.