fix: added missing readBody

Author: Flowko

client/server/api/render/[file].post.ts

@@ -1,6 +1,6 @@
 import { destr } from 'destr'
 import { useCompiler } from '#vue-email'
-import { createError, defineEventHandler } from '#imports'
+import { createError, defineEventHandler, readBody } from '#imports'
 
 export default defineEventHandler(async (event: any) => {
   try {

src/runtime/server/api/render/[file].post.ts

@@ -1,6 +1,6 @@
 import { destr } from 'destr'
 import { useCompiler } from '#vue-email'
-import { createError, defineEventHandler } from '#imports'
+import { createError, defineEventHandler, readBody } from '#imports'
 
 export default defineEventHandler(async (event: any) => {
   try {