feat: update plugin @netlify/plugin-gatsby to version 2.1.4

[token-generator-app]

Thanks for contributing the Netlify plugins directory!

Are you adding a plugin or updating one?

• Adding a plugin
• Updating a plugin

Have you completed the following?

• Read and followed the plugin author guidelines.
• Included all required fields in your entry.
• Tested the plugin locally and on Netlify, using the plugin version stated in your entry.

Test plan
Please add a link to a successful public deploy log using the stated version of the plugin. Include any other context reviewers might need for testing.

[netlify-bot]

Updated Packages

• https://diff.intrinsic.com/@netlify/plugin-gatsby/2.1.3/2.1.4