chore: update comments in docker env file (#11705)

Signed-off-by: -LAN- <laipz8200@outlook.com>

docker/.env.example

@@ -119,8 +119,8 @@ DIFY_BIND_ADDRESS=0.0.0.0
 # API service binding port number, default 5001.
 DIFY_PORT=5001
 
-# The number of API server workers, i.e., the number of gevent workers.
-# Formula: number of cpu cores x 2 + 1
+# The number of API server workers, i.e., the number of workers.
+# Formula: number of cpu cores x 2 + 1 for sync, 1 for Gevent
 # Reference: https://docs.gunicorn.org/en/stable/design.html#how-many-workers
 SERVER_WORKER_AMOUNT=