Where to provide comments on the guides?

[jwbowers]

Hi @graemeblair and @nahomi. Where would you like comments and pull requests on the guides. It looks like they exist in two repositories now.

I found a typo in the meta-analysis guide. Happy to make a pull request but wasn't sure which repository was being archived https://docs.github.com/en/repositories/archiving-a-github-repository/archiving-repositories and which was being maintained.

FYI on the meta-analysis guide:

This next should have $\frac{1}{\hat{\sigma}_2^2}$ in the numerator of the second term rather than $\frac{1}{\hat{\sigma}_1^2}$

$$ \hat{ATE_{pooled}} = \frac{\frac{1}{\hat{\sigma}_1^2}}{\frac{1}{\hat{\sigma}_1^2} + \frac{1}{\hat{\sigma}_2^2}}\hat{ATE_1} + \frac{\frac{1}{\hat{\sigma}_1^2}}{\frac{1}{\hat{\sigma}_1^2} + \frac{1}{\hat{\sigma}_2^2}}\hat{ATE_2} $$