Update onboarding checklist for new staff

Added a task to share timesheet and reimbursement instructions.

Author: rrrutledge

.github/ISSUE_TEMPLATE/onboard-staff.md

@@ -9,5 +9,6 @@ assignees: rrrutledge
 - [ ] Add to [staff team](https://github.com/orgs/InnerSourceCommons/teams/staff).
 - [ ] Add to [#innersource-marketing-team](https://app.slack.com/client/T04PXKRM0/C05KNQT26RK).
 - [ ] Add to [#flax-and-teal-isc](https://app.slack.com/client/T04PXKRM0/C04K4K6362C).
-- [ ] Add to weekly staff meeting.
 - [ ] Create `@innersourcecommons.org` email.
+- [ ] Add to weekly staff meeting.
+- [ ] Share the [timesheet](https://docs.google.com/spreadsheets/d/1i0O0Y5CmHOg15R_RO45hgpLphZDgeEvJ) and [reimbursement instructions](https://github.com/InnerSourceCommons/foundation-governance/blob/master/how-to/bill-foundation.md).