chore(docs): Updated warning icon to use emoji (#30979)
chore(docs): Updated warning icon to use emoji (#30979)

The Gatsby site doesn't support converting the `:warning:` string to a symbol, so I replaced it with the emoji character itself to fix this. This is probably a temporary workaround, as ideally the Gatsby site would parse the `:warning:` string into an emoji.
gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby