Rename "template" spreadsheets to "example" spreadsheets

[lilidworkin]

Description of the change

On a call with our alpha partners, we received feedback that our template spreadsheets were unclear. The users thought they had to fill these spreadsheets in, which is not the case. I'm updating some terminology here to make this clearer.

Type of change

All pull requests must have at least one of the following labels applied (otherwise the PR will fail):

Label	Description
Type: Bug	non-breaking change that fixes an issue
Type: Feature	non-breaking change that adds functionality
Type: Breaking Change	fix or feature that would cause existing functionality to not work as expected
Type: Non-breaking refactor	change addresses some tech debt item or prepares for a later change, but does not change functionality
Type: Configuration Change	adjusts configuration to achieve some end related to functionality, development, performance, or security
Type: Dependency Upgrade	upgrades a project dependency - these changes are not included in release notes

Checklists

Development

This box MUST be checked by the submitter prior to merging:

• Double- and triple-checked that there is no Personally Identifiable Information (PII) being mistakenly added in this pull request

These boxes should be checked by the submitter prior to merging:

• Tests have been written to cover the code changed/added as part of this pull request

Code review

These boxes should be checked by reviewers prior to merging:

• This pull request has a descriptive title and information useful to a reviewer
• This pull request has been moved out of a Draft state, has no "Work In Progress" label, and has assigned reviewers
• Potential security implications or infrastructural changes have been considered, if relevant

[lilidworkin]

@mxosman addressed your comment here!

[lilidworkin]

@mxosman and @terryttsai just moving this PR over from recidiviz-data if you don't mind stamping again!