fix: upgrade gatsby-plugin-image from 3.0.0 to 3.12.0

Snyk has created this PR to upgrade gatsby-plugin-image from 3.0.0 to 3.12.0.

See this package in npm:
https://www.npmjs.com/package/gatsby-plugin-image

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/7fd0fd14-f182-4096-b123-e516d29845e6?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot