Source for 4.c.1

[MaiaPelletier]

Old GIF provides a value but doesn't list or mention a source. Reason for this is provided in a footnote:

In the public provincial and territorial systems in Canada; 100% of teachers have received at least the minimum organized teacher training, as these education systems are highly regulated. Thus, by definition, teachers in the system must meet these requirements in order to teach within that system. No information on private schools are available.

• [x] Populate indicator page with footnote and mark as reported

[MaiaPelletier]

done in https://github.com/sdg-data-canada-odd-donnees/sdg-data-donnees-odd/commit/12a4f327467b71c12ad87b5458de2c9d0018a9d7