Minor: "Report error" button in CalendarError should be title cased to "Report Error" and use localization

[isaacy2012]

Describe the bug A very minor issue, "Report error" button has a lower case "error", when it should be capitalized to "Error" to be consistent with the title casing of the buttons on the rest of the site.

To Reproduce Steps to reproduce the behavior:

1. Go to vaxx.nz
2. Get the calendar to an error state
3. Observe the "Report error" button

Additional Context The incorrect text is located in line 126 of CalendarError.tsx

Screenshots