ref!(gatsby): Drop Gatsby v2 support (#19467)

We drop support for Gatsby v2 (still relies on webpack 4) for a critical
security update in
https://github.com/getsentry/sentry-javascript-bundler-plugins/releases/tag/5.0.0

closes #19465

Author: chargome

CHANGELOG.md

@@ -36,6 +36,11 @@
   This new mode no longer creates a session per soft navigation but continues the initial session until the next hard page refresh.
   Check out the [docs](https://docs.sentry.io/platforms/javascript/guides/nextjs/configuration/integrations/browsersession/) to learn more!
 
+- **ref!(gatsby): Drop Gatsby v2 support
+  ([#19467](https://github.com/getsentry/sentry-javascript/pull/19467))**
+
+We drop support for Gatsby v2 (which still relies on webpack 4) for a critical security update in https://github.com/getsentry/sentry-javascript-bundler-plugins/releases/tag/5.0.0
+
 Work in this release was contributed by @LudvigHz and @jadengis. Thank you for your contributions!
 
 ## 10.39.0

packages/gatsby/package.json

@@ -50,7 +50,7 @@
     "@sentry/webpack-plugin": "^4.8.0"
   },
   "peerDependencies": {
-    "gatsby": "^2.0.0 || ^3.0.0 || ^4.0.0 || ^5.0.0",
+    "gatsby": "^3.0.0 || ^4.0.0 || ^5.0.0",
     "react": "16.x || 17.x || 18.x"
   },
   "devDependencies": {