Tweak FAQ references

Author: katamartin

articles/forest-offsets-explainer/faq.md

@@ -22,11 +22,13 @@ components:
 
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 We are publishing responses to frequently asked technical questions about our
-recent article [Systematic over-crediting of forest offsets](/research/forest-offsets-explainer). Most of these questions can be answered by reading the [paper](https://doi.org/10.1111/gcb.15943), including the extended methods. To make this information more accessible,
+recent article [Systematic over-crediting of forest offsets](/research/forest-offsets-explainer). Most of these questions can be answered by reading our [preprint](https://www.biorxiv.org/content/10.1101/2021.04.28.441870v1.article-info), including the extended methods. To make this information more accessible,
 we developed this FAQ.
 
 Prepared by {authors.map((name, i) => i === authors.length - 1 ? `and ${name}` : name).join(', ')}.
 
+Update: the [paper](https://doi.org/10.1111/gcb.15943) has since been published in _Global Change Biology_.
+
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 ## 01 — Does the paper’s “alternative common practice” estimates lead to lower precision relative to the approach taken by the Climate Action Reserve and the California Air Resources Board?