feat: update plugin @netlify/plugin-nextjs to version 4.30.1 (#1107)

Co-authored-by: token-generator-app[bot] <82042599+token-generator-app[bot]@users.noreply.github.com>
Co-authored-by: Rob Stanford <[email protected]>

Author: token-generator-app[bot]

site/plugins.json

@@ -609,14 +609,10 @@
     "name": "Next.js Runtime",
     "package": "@netlify/plugin-nextjs",
     "repo": "https://github.com/netlify/next-runtime",
-    "version": "4.30.0",
+    "version": "4.30.1",
     "compatibility": [
       {
         "version": "4.30.1",
-        "featureFlag": "build_plugins_use_prerelease"
-      },
-      {
-        "version": "4.30.0",
         "migrationGuide": "https://ntl.fyi/next-plugin-migration"
       },
       {