chore: Fix highlight.js issue with Next.js static build (#413)

Author: leehuwuj

.changeset/stupid-cougars-raise.md

@@ -0,0 +1,5 @@
+---
+"create-llama": patch
+---
+
+Fix the highlight.js issue with the Next.js static build

templates/types/streaming/nextjs/next.config.json

@@ -11,5 +11,6 @@
         "app/**/*"
       ]
     }
-  }
+  },
+  "transpilePackages": ["highlight.js"]
 }