Wait some time before retrying an OpenAI request

OpenAI recommended prectice is to wait some time before retrying
the request that ended with http 5xx code
the bot was not doing that before, now it does
this might fix some issues when we were retrying the request too fast

src/execution.ts

@@ -349,6 +349,7 @@ async function executeFromQueue(channel: string) {
     else errorText = "";
     if (Axios.isAxiosError(e) && e.code?.match(/^5..$/) && channelQueue.tries < 3) {
       channelQueue.tries++;
+      await new Promise(r => setTimeout(r, 2000)); // pause for 2 seconds before retrying
       return executeFromQueue(channel);
     }