Fix Turnstile unable to read the siteKey (#1728)

It seems that Nuxt Turnstile's way of setting the key in `runtimeConfig`
is broken and doesn't work properly, resulting in an error in runtime,
because it has to be set. This commit sets the key in `runtimeConfig`
manually instead, which seems to fix the issue.

nuxt.config.ts

@@ -305,6 +305,8 @@ export default defineNuxtConfig({
         // @ts-ignore
         globalThis.CF_PAGES_COMMIT_SHA ||
         'unknown',
+
+      turnstile: { siteKey: '0x4AAAAAAAW3guHM6Eunbgwu' },
     },
   },
   typescript: {
@@ -362,9 +364,6 @@ export default defineNuxtConfig({
       }
     },
   },
-  turnstile: {
-    siteKey: '0x4AAAAAAAW3guHM6Eunbgwu',
-  },
   nitro: {
     moduleSideEffects: ['@vintl/compact-number/locale-data'],
   },