Update contributor-swag.md

docs/contributing/contributor-swag.md

@@ -20,7 +20,7 @@ If you’ve contributed in other ways, such as giving talks about Gatsby, teachi
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 - We will send one item from our [swag store](https://store.gatsbyjs.org/) per swag tier
 - Tier 1 swag includes most items $10 and under
-- Tier 2 swag includes most items $26 and under
+- Tier 2 swag includes most items $31 and under
 - Not all items are eligible due to high cost to create the swag. We’ll make it clear which items are not eligible
 - There’s a limit of one free swag item per swag tier
 - Shipping is free worldwide